Noun
(organic chemistry) A specific grouping of elements that is characteristic of a class of compounds, and determines some properties and reactions of that class.
Various functional groups often occur in biomolecules.
(ecology) A collection of organisms of specific morphological, physiological, behavioral, biochemical properties.
Source: en.wiktionary.orgAlso, alkanes are generally unreactive chemically or biologically, and do not undergo functional group interconversions cleanly. Source: Internet
A functional group is a molecular module, and the reactivity of that functional group is assumed, within limits, to be the same in a variety of molecules. Source: Internet
If the addition of a functional group takes place at the less substituted carbon atom of the double bond, then the electrophilic substitution with acids is not possible. Source: Internet
A variety of isomers are known, but they all feature an amyl group attached to the nitrite functional group. Source: Internet
For example, in organic chemistry chemists are sometimes concerned only with the functional group of the molecule. Source: Internet
If the presence of another functional group demands the use of a suffix, the aldehyde group is named with the prefix formyl-. Source: Internet