building block

Definitions of building block
  1. noun
    a block of material used in construction work
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    ashlar
    a rectangular block of hewn stone used for building purposes
    breeze block, cinder block, clinker block
    a light concrete building block made with cinder aggregate
    headstone, key, keystone
    the central building block at the top of an arch or vault
    voussoir
    wedge-shaped stone building block used in constructing an arch or vault
    coign, coigne, quoin
    the keystone of an arch
    type of:
    building material
    material used for constructing buildings
  2. noun
    a single undivided natural thing occurring in the composition of something else
    synonyms: unit
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    chain, chemical chain
    (chemistry) a series of linked atoms (generally in an organic molecule)
    couple
    (physics) something joined by two equal and opposite forces that act along parallel lines
    unit cell
    the smallest group of atoms or molecules whose repetition at regular intervals in three dimensions produces the lattices of a crystal
    chemical group, group, radical
    (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
    molecule
    (physics and chemistry) the simplest structural unit of an element or compound
    closed chain, ring
    (chemistry) a chain of atoms in a molecule that forms a closed loop
    dipole
    a pair of equal and opposite electric charges or magnetic poles separated by a small distance
    dipole molecule
    a molecule that is a permanent dipole
    long chain, long-chain molecule
    (chemistry) a relatively long chain of atoms in a molecule
    open chain
    a chain of atoms in a molecule whose ends are not joined to form a ring
    protein molecule
    any large molecule containing chains of amino acids linked by peptide bonds
    acyl, acyl group
    any group or radical of the form RCO- where R is an organic group
    alcohol group, alcohol radical
    the chemical group -OH
    aldehyde group, aldehyde radical
    the chemical group -CHO
    alkyl, alkyl group, alkyl radical
    any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons
    allyl, allyl group, allyl radical
    the univalent unsaturated organic radical C3H5; derived from propylene
    amino, amino group
    the radical -NH2
    amyl
    a hydrocarbon radical that occurs in many organic compounds
    azido group, azido radical
    the univalent group N3- derived from hydrazoic acid
    azo group, azo radical
    the bivalent group -N=N- united to two hydrocarbon groups
    benzyl, benzyl group, benzyl radical
    the univalent radical derived from toluene
    benzoyl group, benzoyl radical
    the univalent radical derived from benzoic acid
    arsenic group, cacodyl, cacodyl group, cacodyl radical
    the univalent group derived from arsine
    carbonyl group
    the bivalent radical CO
    carboxyl, carboxyl group
    the univalent radical -COOH; present in and characteristic of organic acids
    coenzyme
    a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes
    chromophore
    the chemical group that gives color to a molecule
    cyanide group, cyanide radical, cyano group, cyano radical
    the monovalent group -CN in a chemical compound
    EDTA, ethylenediaminetetraacetic acid
    a complex molecule used medically to chelate metal ions in cases of lead or heavy metal poisoning
    glyceryl
    a trivalent radical derived from glycerol by removing the three hydroxyl radicals
    hydrazo group, hydrazo radical
    the bivalent group -HNNH- derived from hydrazine
    hydroxyl, hydroxyl group, hydroxyl radical
    the monovalent group -OH in such compounds as bases and some acids and alcohols
    ketone group
    a group having the characteristic properties of ketones
    macromolecule, supermolecule
    any very large complex molecule; found only in plants and animals
    methylene, methylene group, methylene radical
    the bivalent radical CH2 derived from methane
    propyl, propyl group, propyl radical
    the monovalent organic group C3H7- obtained from propane
    butyl
    a hydrocarbon radical (C4H9)
    nitro group
    the group -NO3
    nitrite
    the radical -NO2 or any compound containing it (such as a salt or ester of nitrous acid)
    uranyl, uranyl group, uranyl radical
    the bivalent radical UO2 which forms salts with acids
    vinyl, vinyl group, vinyl radical
    a univalent chemical radical derived from ethylene
    type of:
    thing
    a separate and self-contained entity
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