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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

thing go
a separate and self-contained entity

unit, building block go
a single undivided natural thing occurring in the composition of something else

group, radical, chemical group
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

noun.substance

27 Subcategories

acyl, acyl group go
any group or radical of the form RCO- where R is an organic group
alcohol group, alcohol radical go
the chemical group -OH
aldehyde group, aldehyde radical go
the chemical group -CHO
alkyl, alkyl group, alkyl radical go
any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons
allyl, allyl group, allyl radical go
the univalent unsaturated organic radical C3H5
amino, amino group go
the radical -NH2
amyl go
a hydrocarbon radical that occurs in many organic compounds
azido group, azido radical go
the univalent group N3- derived from hydrazoic acid
azo group, azo radical go
the bivalent group -N=N- united to two hydrocarbon groups
benzyl, benzyl group, benzyl radical go
the univalent radical derived from toluene
benzoyl group, benzoyl radical go
the univalent radical derived from benzoic acid
cacodyl, cacodyl group, cacodyl radical, arsenic group go
the univalent group derived from arsine
carbonyl group go
the bivalent radical CO
carboxyl, carboxyl group go
the univalent radical -COOH
chromophore go
the chemical group that gives color to a molecule
cyano group, cyano radical, cyanide group, cyanide radical go
the monovalent group -CN in a chemical compound
glyceryl go
a trivalent radical derived from glycerol by removing the three hydroxyl radicals
hydrazo group, hydrazo radical go
the bivalent group -HNNH- derived from hydrazine
hydroxyl, hydroxyl group, hydroxyl radical go
the monovalent group -OH in such compounds as bases and some acids and alcohols
ketone group go
a group having the characteristic properties of ketones
methylene group, methylene radical, methylene go
the bivalent radical CH2 derived from methane
propyl, propyl group, propyl radical go
the monovalent organic group C3H7- obtained from propane
butyl go
a hydrocarbon radical (C4H9)
nitro group go
the group -NO3
nitrite go
the radical -NO2 or any compound containing it (such as a salt or ester of nitrous acid)
uranyl, uranyl group, uranyl radical go
the bivalent radical UO2 which forms salts with acids
vinyl, vinyl group, vinyl radical go
a univalent chemical radical derived from ethylene