chemical

A chemical is any mix of raw elements: hydrogen + oxygen produce the chemical water. Water is created by a change in the chemistry of hydrogen and oxygen atoms — a chemical change.

Be cautious of the negative reaction people have to chemical substances. Chemicals often bring to mind deadly substances, such as asbestos or deadly chemical weapons. But many chemicals are part of our everyday life. Our lives would be drastically different without chemical compounds — think of the infection that would result if we didn't have the chemical hydrogen peroxide for cleaning out cuts.

Definitions of chemical
  1. adjective
    of or made from or using substances produced by or used in reactions involving atomic or molecular changes
    chemical fertilizer”
  2. adjective
    relating to or used in chemistry
    chemical engineer”
    chemical balance”
    synonyms: chemic
  3. noun
    material produced by or used in a reaction involving changes in atoms or molecules
    synonyms: chemical substance
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    types:
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    explosive
    a chemical substance that undergoes a rapid chemical change (with the production of gas) on being heated or struck
    reactant
    a chemical substance that is present at the start of a chemical reaction
    Alar, daminozide
    a chemical sprayed on fruit trees to regulate their growth so the entire crop can be harvested at one time
    carrier
    an inactive substance that is a vehicle for a radioactive tracer of the same substance and that assists in its recovery after some chemical reaction
    bacteriacide, bactericide
    any chemical agent that destroys bacteria
    carbon tetrahalide
    compounds composed of 1 carbon and 4 halogen molecules
    congener
    a minor chemical constituent that gives a wine or liquor its distinctive character
    chemical compound, compound
    (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
    soil conditioner
    a chemical substance used to improve the structure of the soil and increase its porosity
    fertiliser, fertilizer, plant food
    any substance such as manure or a mixture of nitrates used to make soil more fertile
    flux
    a substance added to molten metals to bond with impurities that can then be readily removed
    fumigant
    a chemical substance used in fumigation
    herbicide, weed killer, weedkiller
    a chemical agent that destroys plants or inhibits their growth
    intermediate
    a substance formed during a chemical process before the desired product is obtained
    fraction
    a component of a mixture that has been separated by a fractional process
    larvicide
    a chemical used to kill larval pests
    pesticide
    a chemical used to kill pests (as rodents or insects)
    phytochemical
    a chemical substance obtained from plants that is biologically active but not nutritive
    product
    a chemical substance formed as a result of a chemical reaction
    restrainer
    a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film
    stabilizer
    a chemical that is added to a solution or mixture or suspension to maintain it in a stable or unchanging state
    softener
    a substance added to another to make it less hard
    burster, bursting charge, charge, explosive charge
    a quantity of explosive to be set off at one time
    conditioner
    a substance used in washing (clothing or hair) to make things softer
    explosive compound
    a compound that is explosive
    explosive mixture
    a mixture that is explosive
    impulse explosive, propellant explosive
    an explosive that is used to propel projectiles from guns or to propel rockets and missiles or to launch torpedos and depth charges
    load, payload, warhead
    the front part of a guided missile or rocket or torpedo that carries the nuclear or explosive charge or the chemical or biological agents
    vanillin
    a crystalline compound found in vanilla beans and some balsam resins; used in perfumes and flavorings
    acceptor
    (chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated
    adduct
    a compound formed by an addition reaction
    antiknock
    any of various compounds that are added to gasoline to reduce engine knocking
    plasticiser, plasticizer
    a substance added to plastics or other materials to make them more pliable
    acaracide, acaricide
    a chemical agent used to kill mites
    Agent Orange
    a herbicide used in the Vietnam War to defoliate forest areas
    arsenical
    a pesticide or drug containing arsenic
    acid
    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
    arsenide
    a compound of arsenic with a more positive element
    HN, azoimide, hydrazoic acid, hydrogen azide
    a colorless explosive liquid that is volatile and poisonous and foul-smelling
    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
    hydrolysate
    a product of hydrolysis
    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
    atrazine
    a synthetic compound derived from triazine that is widely used as an agricultural herbicide
    taurine
    a colorless crystalline substance obtained from the bile of mammals
    chromogen
    a compound that can be converted to a pigment
    manganese tetroxide
    an oxide of manganese found naturally as hausmannite
    monomer
    a simple compound whose molecules can join together to form polymers
    ozonide
    any of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound
    carotenoid
    any of a class of highly unsaturated yellow to red pigments occurring in plants and animals
    organic compound
    any compound of carbon and another element or a radical
    ammine
    a complex inorganic compound that contains ammonia molecules
    anhydride
    a compound formed from one or more other compounds in a reaction resulting in removal of water
    azide
    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
    buffer
    (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
    carbonyl
    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
    cofactor
    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
    allomorph
    any of several different crystalline forms of the same chemical compound
    corrosive
    a substance having the tendency to cause corrosion (such a strong acids or alkali)
    aluminate
    a compound of alumina and a metallic oxide
    defoliant
    a chemical that is sprayed on plants and causes their leaves to fall off
    depilatory
    a chemical (usually a sulfide) used to remove hair or wool or bristles from hides
    derivative
    a compound obtained from, or regarded as derived from, another compound
    dimer
    a compound whose molecules are composed of two identical monomers
    high explosive
    a powerful chemical explosive that produces gas at a very high rate
    low explosive
    an explosive with a low rate of combustion
    organic, organic fertiliser, organic fertilizer
    a fertilizer that is derived from animal or vegetable matter
    soldering flux
    flux applied to surfaces that are to be joined by soldering; flux cleans the surfaces and results in a better bond
    potassium bromide
    a white crystalline salt (KBr) used as a sedative and in photography
    filtrate
    the product of filtration; a gas or liquid that has been passed through a filter
    fixer, fixing agent
    a chemical compound that sets or fixes something (as a dye or a photographic image)
    flavone
    a colorless crystalline compound that is part of a number of white or yellow plant pigments
    flavonoid
    any of a large class of plant pigments having a chemical structure based on or similar to flavone
    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
    exotherm
    a compound that gives off heat during its formation and absorbs heat during its decomposition
    goitrogen
    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
    hydrate
    any compound that contains water of crystallization
    hydroxide
    a chemical compound containing the hydroxyl group
    incense
    a substance that produces a fragrant odor when burned
    inorganic compound
    any compound that does not contain carbon
    insect powder, insecticide
    a chemical used to kill insects
    repellant, repellent
    a chemical substance that repels animals
    repellant, repellent
    a compound with which fabrics are treated to repel water
    iodocompound
    a compound containing the covalent iodine radical
    isomer
    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
    linuron
    a herbicide that kills weeds without harming vegetables
    menthol
    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
    nitride
    a compound containing nitrogen and a more electropositive element (such as phosphorus or a metal)
    oxide
    any compound of oxygen with another element or a radical
    paraquat
    a poisonous yellow solid used in solution as a herbicide
    pediculicide
    a chemical agent that kills lice
    phosphine
    a colorless gas with a strong fishy smell; used as a pesticide
    polymer
    a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers
    preservative
    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
    salt
    a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
    caustic
    any chemical substance that burns or destroys living tissue
    nitrate
    any compound containing the nitrate group (such as a salt or ester of nitric acid)
    gunpowder, powder
    a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks
    Ballistite, smokeless powder
    an explosive (trade name Ballistite) that burns with relatively little smoke; contains pyrocellulose and is used as a propellant
    chloride
    any compound containing a chlorine atom
    heterocycle, heterocyclic, heterocyclic compound
    a compound containing a heterocyclic ring
    scabicide
    a drug that destroys the itch mite that causes scabies
    sheep dip
    a liquid mixture containing pesticides in which sheep are dipped to kill parasites
    silicide
    any of various compounds of silicon with a more electropositive element or radical
    siloxane
    any of a large class of compounds that have alternate silicon and oxygen atoms
    silvex
    a herbicide that is effective in controlling woody plants but is toxic to animals
    simazine
    a herbicide used to control weeds (especially among crops)
    solvate
    a compound formed by solvation (the combination of solvent molecules with molecules or ions of the solute)
    spray
    a pesticide in suspension or solution; intended for spraying
    water softener
    a substance (such as sodium chloride) that lessens the hardness of water by replacing calcium and magnesium ions with sodium ions and so gives the water more efficient sudsing power
    sternutator, sternutatory
    a chemical substance that causes sneezing and coughing and crying
    stripper
    a chemical compound used to remove paint or varnish
    sulfide, sulphide
    a compound of sulphur and some other element that is more electropositive
    telluride
    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
    tetrachloride
    any compound that contains four chlorine atoms per molecule
    nitramine, tetryl
    a yellow crystalline explosive solid that is used in detonators
    triazine
    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
    enamel
    a colored glassy compound (opaque or partially opaque) that is fused to the surface of metal or glass or pottery for decoration or protection
    pregnanediol
    a compound found in women's urine during certain phases of the menstrual cycle and in the urine of pregnant women
    type of:
    material, stuff
    the tangible substance that goes into the makeup of a physical object
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