functional group


functional group

noun

Definition of FUNCTIONAL GROUP

:  a characteristic reactive unit of a chemical compound especially in organic chemistry

First Known Use of FUNCTIONAL GROUP

1906

functional group

noun    (Medical Dictionary)

Medical Definition of FUNCTIONAL GROUP

: a characteristic reactive unit of a chemical compound

functional group

noun    (Concise Encyclopedia)

In molecules, any of numerous combinations of atoms that undergo characteristic chemical reactions themselves and in many cases influence the reactivity of the rest of the molecule. Organic compounds are often classified according to the functional groups they contain. Common functional groups include hydroxyl (OH), in alcohols and phenols; carboxyl (COOH), in carboxylic acids; carbonyl (CO), in aldehydes, ketones, amides, carboxylic acids, esters, and quinones; and nitro (NO) and amino (NH), in certain organic nitrogen compounds.

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