If you compound a problem you add something to it to make it worse, like say, putting water on a grease fire. Compound means to combine; a compound is a combination or mixture of two or more things.

Compound has several specialized uses. A compound is either a mixture or two or more things, or a heavily guarded residence, such as a drug lord might have. In botany, a compound leaf consists of more than one part. In linguistics, a compound is a word that consists of two or more independent words. In chemistry, a compound is a substance created when atoms from chemical elements join together.

Primary Meanings of compound

a whole formed by a union of two or more elements or parts
composed of more than one part
combine so as to form a whole; mix
an enclosure of residences and other buildings (especially in the Orient)
make more intense, stronger, or more marked
calculate principal and interest
Full Definitions of compound

n a whole formed by a union of two or more elements or parts

Type of:
all of something including all its component elements or parts

n (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

chemical compound
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a crystalline compound found in vanilla beans and some balsam resins; used in perfumes and flavorings
(chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated
a compound formed by an addition reaction
any of various compounds that are added to gasoline to reduce engine knocking
any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
a compound of arsenic with a more positive element
hydrogen cyanide
a highly poisonous gas or volatile liquid that smells like bitter almonds; becomes a gas at around 90 degree Fahrenheit and is most dangerous when inhaled; the anhydride of hydrocyanic acid; used in manufacturing
anionic compound
a compound characterized by an active anion
alkali, base
any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
binary compound
chemical compound composed of only two elements
a colorless crystalline substance obtained from the bile of mammals
a compound that can be converted to a pigment
manganese tetroxide
an oxide of manganese found naturally as hausmannite
a simple compound whose molecules can join together to form polymers
any of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound
organic compound
any compound of carbon and another element or a radical
a complex inorganic compound that contains ammonia molecules
a compound formed from one or more other compounds in a reaction resulting in removal of water
a chemical compound containing the azido group combined with an element or radical
bitter principle
any one of several hundred compounds having a bitter taste; not admitting of chemical classification
(chemistry) an ionic compound that resists changes in its pH
calcium-cyanamide, cyanamide
a compound used as a fertilizer and as a source of nitrogen compounds
a compound containing metal combined with carbon monoxide
carbon disulfide
a toxic colorless flammable liquid (CS2); used in the manufacture of rayon and cellophane and carbon tetrachloride and as a solvent for rubber
a substance (as a coenzyme) that must join with another to produce a given result
cementite, iron carbide
a chemical compound that is a constituent of steel and cast iron; very hard and brittle
chloropicrin, nitrochloroform
a heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas
complex, coordination compound
a compound described in terms of the central atom to which other atoms are bound or coordinated
any of several different crystalline forms of the same chemical compound
a substance having the tendency to cause corrosion (such a strong acids or alkali)
a compound of alumina and a metallic oxide
a chemical that is sprayed on plants and causes their leaves to fall off
a chemical (usually a sulfide) used to remove hair or wool or bristles from hides
a compound obtained from, or regarded as derived from, another compound
a compound whose molecules are composed of two identical monomers
fixer, fixing agent
a chemical compound that sets or fixes something (as a dye or a photographic image)
a colorless crystalline compound that is part of a number of white or yellow plant pigments
formulation, preparation
a substance prepared according to a formula
enantiomer, enantiomorph
either one of a pair of compounds (crystals or molecules) that are mirror images on each other but are not identical
a compound that gives off heat during its formation and absorbs heat during its decomposition
any substance (such as thiouracil) that induces the formation of a goiter
benzofuran, coumarone, cumarone
a colorless oily compound extracted from coal tar and used in manufacturing synthetic resins
synthetic, synthetic substance
a compound made artificially by chemical reactions
any compound that contains water of crystallization
a chemical compound containing the hydroxyl group
a substance that produces a fragrant odor when burned
inorganic compound
any compound that does not contain carbon
repellant, repellent
a chemical substance that repels animals
repellant, repellent
a compound with which fabrics are treated to repel water
a compound containing the covalent iodine radical
a compound that exists in forms having different arrangements of atoms but the same molecular weight
hydrated oxide, hydroxide
a compound of an oxide with water
a crystalline compound that has the cool and minty taste and odor that occurs naturally in peppermint oil; used as a flavoring and in medicine to relieve itching, pain, and nasal congestion
nitrogen mustard
a toxic compound resembling mustard gas in structure; important in cancer treatment
a compound containing nitrogen and a more electropositive element (such as phosphorus or a metal)
any compound of oxygen with another element or a radical
a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers
a chemical compound that is added to protect against decay or decomposition
benzoquinone, quinone
any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes
a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
any chemical substance that burns or destroys living tissue
any compound containing the nitrate group (such as a salt or ester of nitric acid)
any compound containing a chlorine atom
heterocycle, heterocyclic, heterocyclic compound
a compound containing a heterocyclic ring
any of various compounds of silicon with a more electropositive element or radical
any of a large class of compounds that have alternate silicon and oxygen atoms
a compound formed by solvation (the combination of solvent molecules with molecules or ions of the solute)
sternutator, sternutatory
a chemical substance that causes sneezing and coughing and crying
a chemical compound used to remove paint or varnish
sulfide, sulphide
a compound of sulphur and some other element that is more electropositive
any binary compound of tellurium with other more electropositive elements
tenderiser, tenderizer
a substance (as the plant enzyme papain) applied to meat to make it tender
any compound that contains four chlorine atoms per molecule
any of three isomeric compounds having three carbon and three nitrogen atoms in a six-membered ring
U308, yellowcake
an impure mixture of uranium oxides obtained during the processing of uranium ore
a colored glassy compound (opaque or partially opaque) that is fused to the surface of metal or glass or pottery for decoration or protection
a compound found in women's urine during certain phases of the menstrual cycle and in the urine of pregnant women
cleaner, cleanser, cleansing agent
a preparation used in cleaning something
any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids
alcapton, alkapton, homogentisic acid
an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine
a synthetic material resembling clay but remaining soft; used as a substitute for clay or wax in modeling (especially in schools)
acetate, ethanoate
a salt or ester of acetic acid
lead tetraethyl, tetraethyl lead
a clear oily poisonous liquid added to gasoline to prevent knocking
aliphatic compound
organic compound that is an alkane or alkene or alkyne or their derivative
organic compound that has an alkyl group bound to a benzene ring
alkyl halide, haloalkane
organic compound in which halogen atoms have been substituted for hydrogen atoms in an alkane
amino acid, aminoalkanoic acid
organic compounds containing an amino group and a carboxylic acid group
a salt or ester of citric acid
any organic compound containing two amino groups
an organic compound that contains a hydroxyl group bonded to a carbon atom which in turn is doubly bonded to another carbon atom
a salt or ester of arsenic acid
arsenic acid
an acid formed from arsenic pentoxide
cerotic acid, hexacosanoic acid
a white solid fatty acid found in waxes (such as beeswax)
any salt of chloric acid
chloric acid
(HClO3) a strong unstable acid with an acrid odor found in chlorate salts
chlorous acid
(HClO2) a strongly oxidizing acid; known only in solution
monobasic acid
an acid containing only one replaceable hydrogen atom per molecule
dibasic acid
an acid containing two replaceable hydrogen atoms per molecule
dibasic salt
a salt derived by replacing two hydrogen atoms per molecule
tribasic acid
an acid containing three replaceable hydrogen atoms per molecule
tetrabasic acid
an acid containing four replaceable hydrogen atoms per molecule
fulminic acid
(CNOH) an unstable acid occurring mainly in the form of explosive salts and esters that is isomeric with cyanic acid
gamma acid
a crystalline acid used to make azo dyes
hydriodic acid
(HI) a colorless or yellow aqueous solution of hydrogen iodide
hydrocyanic acid, prussic acid
a solution of hydrogen cyanide in water; weak solutions are used in fumigating and in the synthesis of organic compounds
hydroxy acid
any acid that has hydroxyl groups in addition to the hydroxyl group in the acid itself
any salt or ester of hypochlorous acid
hyponitrous acid
an explosive white crystalline weak acid (H2N2O2)
lysergic acid
a crystalline acid often used in medical research; obtained from ergotic alkaloids
manganic acid
a dibasic acid (H2MnO4) found only in solution and in manganate salts
a salt or ester of pyrophosphoric acid
2-methylpropenoic acid, methacrylic acid
an unsaturated acid (C4H6O2) used to make resins and plastics
selenic acid
a strong acid (H2SeO4) analogous to sulfuric acid
a salt of sulphonic acid
sulfonic acid, sulphonic acid
an acid derived from sulphuric acid
titanic acid
a white weak acid that is a hydrated form of titanium dioxide
titania, titanic oxide, titanium dioxide, titanium oxide
a white powder used as a pigment for its high covering power and durability
chelate, chelate compound
a heterocyclic compound having a metal ion attached by coordinate bonds to at least two nonmetal ions
a compound in which the hydrogen atoms of a hydrocarbon have been replaced by bromine and other halogen atoms; very stable; used in fire extinguishers although it is thought to release bromine that depletes the ozone layer
a synthetic substance that is fluorescent or phosphorescent; used to coat the screens of cathode ray tubes
common salt, sodium chloride
a white crystalline solid consisting mainly of sodium chloride (NaCl)
a salt or ester of lactic acid
a salt of perchloric acid
perchloric acid
a powerful oxidizing agent; forms perchlorates
an oxide containing five atoms of oxygen in the molecule
any of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids
quaternary ammonium compound
a compound derived from ammonium with hydrogen atoms replaced by organic groups; used as surface-active agents, disinfectants, and in drugs
proenzyme, zymogen
any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active
a crystalline compound used as an antithyroid drug in the treatment of goiter
a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal
any of various metallic-looking sulfides (of which pyrite is the commonest)
a colorless crystalline organic base containing nitrogen; the parent compound of various biologically important substances
any of several bases that are derivatives of purine
any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
any organic compound formed by adding alcohol molecules to aldehyde molecules
aldehyde-alcohol, aldol
an oily colorless liquid obtained by the condensation of two molecules of acetaldehyde; contains an alcohol group (-OH) and an aldehyde group (-CHO)
a mixture of soluble salts found in arid soils and some bodies of water; detrimental to agriculture
natural bases containing nitrogen found in plants
any organic compound containing the group -CONH2
a substance that curdles milk in making cheese and junket
carboxylic acid
an organic acid characterized by one or more carboxyl groups
aminobenzoic acid
a derivative of benzoic acid
a pungent gas compounded of nitrogen and hydrogen (NH3)
ammonium chloride, sal ammoniac
a white salt used in dry cells
stercobilinogen, urobilinogen
a chromogen formed in the intestine from the breakdown of bilirubin; yields urobilins on oxidation; some is excreted in the feces and some is resorbed and excreted in bile or urine
aqua fortis, nitric acid
acid used especially in the production of fertilizers and explosives and rocket fuels
nitrous acid
an unstable inorganic acid known only in solution and as nitrite salts
nitrogen oxide
any of several oxides of nitrogen formed by the action of nitric acid on oxidizable materials; present in car exhausts
aqua regia, nitrohydrochloric acid
a yellow fuming corrosive mixture of nitric and hydrochloric acid that dissolves metals (including gold)
acetic anhydride
a compound that is needed in order to refine opium into heroin
phthalic anhydride
a white cyclic anhydride
a salt of hydrazoic acid
a compound made up of a ring of four carbon atoms and one sulfur atom and one nitrogen atom
barbituric acid, malonylurea
a white crystalline acid derived from pyrimidine; used in preparing barbiturate drugs
any salt or ester of benzoic acid
Prevacid, lansoprazole
antacid (trade name Prevacid) that suppresses acid secretion in the stomach
a salt or ester of boric acid
boracic acid, boric acid
any of various acids containing boron and oxygen
boric acid, orthoboric acid
a white or colorless slightly acid solid that is soluble in water and ethanol; used in the manufacture of glass and paper and adhesives and in detergents and as a flux in welding; also used as an antiseptic and food preservative
a salt of boric and silicic acids
bromic acid
an unstable acid used as an oxidizing agent
cacodyl, tetramethyldiarsine
a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air
calcium carbide
a grey salt of calcium (CaC) used in making acetylene
calcium lactate
a white crystalline salt made by the action of lactic acid on calcium carbonate; used in foods (as a baking powder) and given medically as a source of calcium
calcium nitrate
a deliquescent salt that is soluble in water; sometimes used as a source of nitrogen in fertilizers
burnt lime, calcined lime, calcium oxide, calx, fluxing lime, lime, quicklime, unslaked lime
a white crystalline oxide used in the production of calcium hydroxide
calcium octadecanoate, calcium stearate
an insoluble calcium salt of stearic acid and palmitic acid; it is formed when soap is mixed with water that contains calcium ions and is the scum produced in regions of hard water
a salt (or ester) of carbamic acid
carbamic acid
an acid that is known only by virtue of its salts (as ammonium carbamate) or its esters (as urethane)
a binary compound of carbon with a more electropositive element
cellulose nitrate, guncotton, nitrocellulose, nitrocotton
a nitric acid ester; used in lacquers and explosives
carbolic acid, hydroxybenzene, oxybenzene, phenol, phenylic acid
a toxic white soluble crystalline acidic derivative of benzene; used in manufacturing and as a disinfectant and antiseptic; poisonous if taken internally
carbon tet, carbon tetrachloride, perchloromethane, tetrachloromethane
a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined
a salt or ester of carbonic acid (containing the anion CO3)
a salt or ester of fulminic acid
carbonic acid
a weak acid known only in solution; formed when carbon dioxide combines with water
any organic substance that occurs in neural activity
acid anhydrides, acyl anhydrides
organic compounds that react with water to form an acid
acid halide, acyl halide
organic compounds containing the group -COX where X is a halogen atom
chromic acid
an unstable acid known only in solution and as chromate salts
any salt or ester of chromic acid
citric acid
a weak water-soluble acid found in many fruits (especially citrus fruits); used as a flavoring agent
a complex consisting of an organic base in association with hydrogen chloride
copper oxide
an oxide of copper
aluminium hydroxide, aluminum hydroxide, hydrated aluminium oxide, hydrated aluminum oxide
white crystalline compound that occurs naturally as the mineral gibbsite
coal-tar creosote, creosote
a dark oily liquid obtained by distillation of coal tar; used as a preservative for wood
a colorless or yellowish oily liquid obtained by distillation of wood tar; used as an antiseptic
cyanamid, cyanamide
a weak soluble dibasic acid (the parent acid of cyanamide salts)
cyanic acid
a colorless poisonous volatile liquid acid that hydrolyzes readily to ammonia and carbon dioxide
an extremely poisonous salt of hydrocyanic acid
cyanide, nitril, nitrile
any of a class of organic compounds containing the cyano radical -CN
any organic compound in which the cyano radical -CN and the hydroxyl radical -OH are attached to the same carbon atom
cyanuric acid
a trimer of cyanic acid
DNA, deoxyribonucleic acid, desoxyribonucleic acid
(biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information
RNA, ribonucleic acid
(biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell
an oxide containing two atoms of oxygen in the molecule
H2O, water
binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
formed by reaction between an acid and an alcohol with elimination of water
soda niter, sodium nitrate
(NaNO3) used especially as a fertilizer and explosive
niter, nitre, potassium nitrate, saltpeter, saltpetre
(KNO3) used especially as a fertilizer and explosive
potassium bromide
a white crystalline salt (KBr) used as a sedative and in photography
potassium chlorate
a white salt (KClO3) used in matches, fireworks, and explosives; also used as a disinfectant and bleaching agent
potassium dichromate
an orange-red salt used in making dyes and in photography
ferric oxide
a red oxide of iron
ferricyanic acid
a brown unstable acid formed from ferricyanide
salt of ferricyanic acid obtained by oxidation of a ferrocyanide
ferrocyanic acid
a white unstable acid formed from ferrocyanide salts
salt of ferrocyanic acid usually obtained by a reaction of a cyanide with iron sulphate
a compound (such as ethanol or formaldehyde) that fixes tissues and cells for microscopic study
fluoroboric acid
an acid of fluorine and boron
a salt of fluoroboric acid
salt of fluosilicic acid
fluosilicic acid, hydrofluosilicic acid
an unstable poisonous corrosive acid known primarily in the form of its salts
formic acid
a colorless pungent fuming vesicatory liquid acid HCOOH found naturally in ants and many plants or made catalytically from carbon monoxide and steam; used in finishing textiles and paper and in the manufacture of insecticides and fumigants
fumaric acid
a colorless crystalline acid with a fruity taste; used in making polyester resins
furan, furane, furfuran
a colorless toxic flammable liquid used in the synthesis of nylon
gallic acid
a colorless crystalline acid obtained from tannin
a salt or ester of glutamic acid
glyceric acid
a syrupy acid obtained by oxidation of glycerol or glyceraldehyde
glycerinated gelatin
a gelatinous preparation made from gelatin and glycerin and water; used as a base for ointments and suppositories
Nitrospan, Nitrostat, glyceryl trinitrate, nitroglycerin, nitroglycerine, trinitroglycerin
a heavy yellow poisonous oily explosive liquid obtained by nitrating glycerol; used in making explosives and medically as a vasodilator (trade names Nitrospan and Nitrostat)
a group of compounds derived from monosaccharides
glycolic acid, glycollic acid, hydroxyacetic acid
a translucent crystalline compound found in sugar cane and sugar beets and unripe grapes
resin, rosin
any of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple molecules
synthetic resin
a resin having a polymeric structure; especially a resin in the raw state; used chiefly in plastics
a polymer consisting of two or more different monomers
polyurethan, polyurethane
any of various polymers containing the urethane radical; a wide variety of synthetic forms are made and used as adhesives or plastics or paints or rubber
a salt of any halogen acid
one of various compounds of carbon and any of the halogens
an organic compound usually formed as an intermediate product in the preparation of acetals from aldehydes or ketones
erythrocytolysin, erythrolysin, haemolysin, hemolysin
any substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobin
humic substance
an organic residue of decaying organic matter
any binary compound formed by the union of hydrogen and other elements
hydrobromic acid
an aqueous solution of hydrogen bromide that is a strong liquid acid
an organic compound containing only carbon and hydrogen
chlorohydric acid, hydrochloric acid
an aqueous solution of hydrogen chloride; a strongly corrosive acid
hydrogen chloride
a colorless corrosive gas (HCl)
hydrofluoric acid
a weak poisonous liquid acid; formed by solution of hydrogen fluoride in water
hydroiodic acid
an acid formed by aqueous solution of hydrogen iodide
hydrogen sulfide
a sulfide having the unpleasant smell of rotten eggs
hypo, sodium thiosulfate, sodium thiosulphate
a compound used as a fixing agent in photographic developing
hypochlorous acid
a weak unstable acid known only in solution and in its salts; used as a bleaching agent and as an oxidizing agent
glyoxaline, imidazole, iminazole
an organic base C3H4N2; a histamine inhibitor
insect repellant, insect repellent, insectifuge
a chemical substance that repels insects
iodic acid
a soluble crystalline acid; used as a reagent and disinfectant
iron disulfide
a compound containing two atoms of sulfur combined with iron
a salt or ester of isocyanic acid
isocyanic acid
an acid known only in the form of its esters
itaconic acid
a crystalline carboxylic acid; occurs in some fermentations of sugars
joss stick
a slender stick of incense burned before a joss by the Chinese
any of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals
a complex polymer; the chief constituent of wood other than carbohydrates; binds to cellulose fibers to harden and strengthen cell walls of plants
calcium hydrate, calcium hydroxide, caustic lime, hydrated lime, lime, lime hydrate, slaked lime
a caustic substance produced by heating limestone
calcium chloride
a deliquescent salt; used in de-icing and as a drying agent
calcium sulfate, calcium sulphate
a white salt (CaSO4)
a strong solution of sodium or potassium hydroxide
macromolecule, supermolecule
any very large complex molecule; found only in plants and animals
magnesium hydroxide
a white crystalline powder used chiefly in medicines
magnesium nitride
a nitride containing nitrogen and magnesium
maleic acid
a colorless crystalline compound found in unripe fruit (such as apples or tomatoes or cherries) and used mainly to make polyester resins
a salt of manganic acid containing manganese as its anion
cyanuramide, melamine
a white crystalline organic base; used mainly in making melamine resins
calomel, mercurous chloride
a tasteless colorless powder used medicinally as a cathartic
a hydrate that contains one molecule of water per molecule of the compound
an oxide containing just one atom of oxygen in the molecule
chrome alum
a violet-colored salt used in hide tanning and as a mordant in dyeing
a salt or ester of tartaric acid
a medicinal liquid preparation intended for use in an atomizer
a poisonous oily water-soluble liquid used as a solvent and in the manufacture of aniline
polyamide, polymeric amide
a polymer containing repeated amide groups
oxalacetate, oxaloacetate
a salt or ester of oxalacetic acid
oxalacetic acid, oxaloacetic acid
an acid formed by oxidation of maleic acid (as in metabolism of fats and carbohydrates)
a salt or ester of oxalic acid
ethanedioic acid, oxalic acid
a toxic colorless crystalline organic acid found in oxalis and other plants; used as a bleach and rust remover and in chemical analysis
any compound containing the group -C=NOH
oxyacid, oxygen acid
any acid that contains oxygen
pantothen, pantothenic acid
a vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids; occurs in many foods
PABA, para aminobenzoic acid
a metabolic acid found in yeast and liver cells; used to make dyes and drugs and sun blockers
pectic acid
a complex acid that occurs in ripe fruit and some vegetables
a dark purple salt of permanganic acid; in water solution it is used as a disinfectant and antiseptic
permanganic acid
an unstable purple acid (HMnO4) known only in solution or of permanganate salts
an inorganic compound containing the divalent ion -O-O-
any compound obtained from petroleum or natural gas
inorganic phosphate, orthophosphate, phosphate
a salt of phosphoric acid
creatine phosphate, creatine phosphoric acid, phosphocreatine
an organic compound of creatine and phosphoric acid; found in the muscles of vertebrates where its hydrolysis releases energy for muscular contraction
phthalic acid
a colorless acid used to make dyes and perfumes
picric acid
a yellow toxic highly explosive strong acid; used in high explosives and as a dye and in chemical reactions
any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups
a salt or ester of polyphosphoric acid
a preparation used in polishing
caustic potash, potash, potassium hydroxide
a potassium compound often used in agriculture and industry
acrylate, propenoate
a salt or ester of propenoic acid
a heterocyclic organic compound with a penetrating odor
any of several basic compounds derived from pyrimidine
pyruvic acid
a colorless acid formed as an important intermediate in metabolism or fermentation
a bitter compound used as an insecticide and tonic and vermifuge; extracted from the wood and bark of trees of the genera Quassia and Picrasma
minium, red lead
a reddish oxide of lead (Pb3O4) used as a pigment in paints and in glass and ceramics
rubber, synthetic rubber
any of various synthetic elastic materials whose properties resemble natural rubber
a salt of salicylic acid (included in several commonly used drugs)
double salt
a solution of two simple salts that forms a single substance on crystallization
bile salt
a salt of bile acid and a base; functions as an emulsifier of lipids and fatty acids
Glauber's salt, Glauber's salts
(Na2SO4.10H2O) a colorless salt used as a cathartic
cream of tartar, potassium bitartrate, potassium hydrogen tartrate, tartar
a salt used especially in baking powder
sodium chlorate
a colorless salt (NaClO3) used as a weed killer and an antiseptic
dichromic acid
the hypothetical acid (H2Cr2O7) from which dichromates are derived; known only in solution and in the form of dichromate salts
bichromate, dichromate
a salt of the hypothetical dichromic acid
sodium bichromate, sodium dichromate
a red-orange salt used as a mordant
ammonium nitrate
used as an explosive and fertilizer and rocket propellant
silver nitrate
a nitrate used in making photographic emulsions; also used in medicine as a cautery and as a topical antibacterial agent
caustic soda, sodium hydroxide
a strongly alkaline caustic used in manufacturing soap and paper and aluminum and various sodium compounds
microcosmic salt
a white salt present in urine and used to test for metal oxides
any compound containing three chlorine atoms in each molecule
bichloride, dichloride
a compound containing two chlorine atoms per molecule
a chloride containing an unusually high proportion of chlorine
aluminium chloride, aluminum chloride
a chloride used as a wood preservative or catalyst
dichloromethane, methylene chloride
a nonflammable liquid used as a solvent and paint remover and refrigerant
obidoxime chloride
a chloride used as an antidote for nerve gases such as sarin or VX
silver chloride
a chloride used chiefly in the manufacture of photographic emulsions
stannic chloride
a colorless caustic liquid made by treating tin with chlorine
a commercial preparation of starch that is used to stiffen textile fabrics in laundering
hemin, protohemin
a reddish-brown chloride of heme; produced from hemoglobin in laboratory tests for the presence of blood
silicic acid
a jellylike substance (hydrated silica)
a salt or ester derived from silicic acid
silicone, silicone polymer
any of a large class of siloxanes that are unusually stable over a wide range of temperatures; used in lubricants and adhesives and coatings and synthetic rubber and electrical insulation
silica, silicon dioxide, silicon oxide
a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite
smelling salts
a pungent preparation of ammonium carbonate and perfume; sniffed as a stimulant to relieve faintness
sal soda, soda, soda ash, sodium carbonate, washing soda
a sodium salt of carbonic acid; used in making soap powders and glass and paper
sodium carboxymethyl cellulose
a gummy substance that is a sodium salt of carboxymethyl cellulose; used as a thickening or emulsifying agent
sodium fluoride
a colorless crystalline salt of sodium (NaF) used in fluoridation of water and to prevent tooth decay
aromatic substances of vegetable origin used as a preservative
any of several fat-soluble organic compounds having as a basis 17 carbon atoms in four rings; many have important physiological effects
nonsteroid, nonsteroidal
an organic compound that does no contain a steroid
sulfanilic acid, sulphanilic acid
a crystalline acid made from aniline and used as a dye
sulfate, sulphate
a salt or ester of sulphuric acid
sulfur oxide, sulphur oxide
any of several oxides of sulphur
a metallic oxide containing the univalent anion O2-
an oxide containing four atoms of oxygen in the molecule
depresses the function of the thyroid gland
a salt of thiocyanic acid; formed when alkaline cyanides are fused with sulfur
thiocyanic acid
an unstable acid that can be obtained by distilling a thiocyanate salt
toluic acid
an isomeric acid derived from toluene
a polymer (or a molecule of a polymer) consisting of three identical monomers
an oxide containing three atoms of oxygen in the molecule
triphosphoric acid
an acid that is a partial anhydride of three molecules of phosphoric acid; known chiefly in the form of its salts and esters
a salt of tungstic acid
coenzyme Q, ubiquinone
any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration
undecylenic acid
an acid that is a component of perspiration
uranyl nitrate
a yellow salt obtained by the reaction of uranium salts with nitric acid
carbamide, urea
the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
uric acid
a white tasteless odorless crystalline product of protein metabolism; found in the blood and urine
a salt of uric acid
a salt or ester of vanadic acid; an anion containing pentavalent vanadium
oil of vitriol, sulfuric acid, sulphuric acid, vitriol
(H2SO4) a highly corrosive acid made from sulfur dioxide; widely used in the chemical industry
cadmium sulfide
a yellow sulfide used chiefly as a pigment
flowers of zinc, philosopher's wool, philosophers' wool, zinc oxide
oxide of zinc; a white powder used as a pigment or in cosmetics or glass or inks and in zinc ointment
zinc sulfide, zinc sulphide
a yellow to white crystalline fluorescent compound that occurs naturally as sphalerite or wurtzite and is used as a luminous pigment
zirconia, zirconium dioxide, zirconium oxide
a white crystalline oxide; used in refractories and in insulation and abrasives and enamels and glazes
any of a class of organic compounds that contain the divalent radical -CONHCO-
a salt or ester of xanthic acid
xanthic acid
any of a class of unstable organic acids containing sulphur
crystalline oxidation product of the metabolism of nucleoproteins; precursor of uric acid; found in many organs and in urine
Type of:
chemical, chemical substance
material produced by or used in a reaction involving changes in atoms or molecules

adj composed of more than one part

compound leaves are composed of several lobes”
compound flower heads”
bilobate, bilobated, bilobed
having two lobes
growing in two parts or in pairs
divided into two portions almost to the base
of a leaf shape; having doubly pinnate leaflets (as ferns)
pinnatifid with the segments also pinnatifid
cleft, dissected
having one or more incisions reaching nearly to the midrib
(of a pinnate leaflet) having only one pair of leaflets
of a compound leaf; consisting of divisions that are themselves compound
abruptly-pinnate, even-pinnate, paripinnate
(of a leaf shape) pinnate with a pair of leaflets at the apex
sharply and deeply indented
lobate, lobed
having deeply indented margins but with lobes not entirely separate from each other
imparipinnate, odd-pinnate
(a leaf shape) pinnate with a single leaflet at the apex
palm-shaped, palmate
of a leaf shape; having leaflets or lobes radiating from a common point
of a leaf shape; palmately cleft rather than lobed
having a margin incised almost to the base so as to create distinct divisions or lobes
of a leaf shape; having radiating lobes, each deeply cleft or divided
pinnate, pinnated
(of a leaf shape) featherlike; having leaflets on each side of a common axis
(of a leaf shape) cleft nearly to the midrib in broad divisions not separated into distinct leaflets
(of a leaf shape) cleft nearly to the midrib in narrow divisions not separated into distinct leaflets
(of a leaf shape) having five leaflets
having rays or ray-like parts as in the flower heads of daisies
(of a leaf shape) consisting of three leaflets or sections
trifoliate, trifoliated, trifoliolate
(of a leaf shape) having three leaflets
three-lobed, trilobate, trilobated, trilobed
(of a leaf shape) divided into three lobes
tripinnate, tripinnated
(of a leaf shape) thrice pinnate
(of a leaf shape) bipinnatifid with segments pinnatifid
complicated in structure; consisting of interconnected parts
of the margin of a leaf shape; not broken up into teeth
of the margin of a leaf shape; having the edge cut or fringed or scalloped
simple, unsubdivided
(botany) of leaf shapes; of leaves having no divisions or subdivisions
acerate, acerose, acicular, needle-shaped
narrow and long and pointed; as pine leaves
(of a leaf shape) narrowing to a slender point
(of a leaf shape) having a short sharply pointed tip
(of a leaf shape) tapering gradually into a long taillike tip
cordate, cordiform, heart-shaped
(of a leaf) shaped like a heart
cuneate, wedge-shaped
(of a leaf shape) narrowly triangular, wider at the apex and tapering toward the base
triangular or suggesting a capital delta, with a point at the apex
dolabrate, dolabriform
having the shape of the head of an ax or cleaver
(of a leaf shape) in the form of an ellipse
bladelike, ensiform, sword-shaped, swordlike
shaped like a sword blade
hastate, spearhead-shaped
(of a leaf shape) like a spear point, with flaring pointed lobes at the base
lancelike, lanceolate
(of a leaf shape) shaped like a lance head; narrow and tapering to a pointed apex
elongate, linear
(of a leaf shape) long and narrow
(of a leaf shape) having curvature suggestive of a lyre
of trees whose leaves are acerate
(of conifers) having two needles
(of conifers) having three needles
(of conifers) having four needles
(of conifers) having five needles
(of a leaf shape) rounded at the apex
(of a leaf shape) having a broad rounded apex and a tapering base
(of a leaf shape) having a somewhat elongated form with approximately parallel sides
(of a leaf shape) egg-shaped with the narrower end at the base
orbicular, orbiculate
circular or nearly circular
of a leaf shape; egg-shaped with the broader end at the base
fiddle-shaped, pandurate, panduriform
(of a leaf shape) having rounded ends and a contracted center
peltate, shield-shaped
(of a leaf shape) round, with the stem attached near the center of the lower surface rather than the margin (as a nasturtium leaf for example)
(of a leaf) having the base united around (and apparently pierced by) the stem
kidney-shaped, reniform
(of a leaf or bean shape) resembling the shape of kidney
arrow-shaped, sagittate, sagittiform
(of a leaf shape) like an arrow head without flaring base lobes
spatula-shaped, spatulate
(of a leaf shape) having a broad rounded apex and a narrow base
without lobes
having few parts; not complex or complicated or involved
of the margin of a leaf shape; not broken up into teeth
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adj consisting of two or more substances or ingredients or elements or parts

“soap is a compound substance”
“housetop is a compound word”
“a blackberry is a compound fruit”
complicated in structure; consisting of interconnected parts

adj composed of many distinct individuals united to form a whole or colony

complicated in structure; consisting of interconnected parts

v combine so as to form a whole; mix

compound the ingredients”
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incorporate, integrate
make into a whole or make part of a whole
combine (a radio frequency wave) with a locally generated wave of a different frequency so as to produce a new frequency equal to the sum or the difference between the two
sulfurette, sulphurette
combine with sulfur
combine with carbon
incorporate a food ingredient into a mixture by repeatedly turning it over without stirring or beating
integrate again
build in
make something an integral part of something else
incorporate again or anew
Type of:
amalgamate, commix, mingle, mix, unify
to bring or combine together or with something else

v put or add together

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totalise, totalize
make into a total
to combine or put together again
combine (electronic signals)
synthesise, synthesize
combine so as to form a more complex, product
Type of:
make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of

v create by mixing or combining

Type of:
assemble, piece, put together, set up, tack, tack together
create by putting components or members together

n an enclosure of residences and other buildings (especially in the Orient)

Type of:
a structure consisting of an area that has been enclosed for some purpose

v make more intense, stronger, or more marked

deepen, heighten, intensify
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heat up, hot up, screw up
make more intense
make (an emotion) fiercer
enhance, heighten, raise
increase the volume of
make crisp or more crisp and precise
heighten, sharpen
make (one's senses) more acute
increase the effect of or act synergistically with (a drug or a physiological or biochemical phenomenon)
subtilise, subtilize
make (senses) more keen
Type of:
become bigger or greater in amount

v calculate principal and interest

Type of:
account, calculate
keep an account of