HYDROXYL

hydroxyl, hydroxyl group, hydroxyl radical

(noun) the monovalent group -OH in such compounds as bases and some acids and alcohols

Source: WordNet® 3.1

Etymology

Noun

hydroxyl (plural hydroxyls)

(chemistry) A univalent radical or functional group (–OH) in organic chemistry; present in alcohols, phenols, carboxylic acids and certain other classes of compounds.

Source: Wiktionary

Hy*drox"yl, n. Etym: [Hydro-, 2 + oxygen + -yl.] (Chem.)

Definition: A compound radical, or unsaturated group, HO, consisting of one atom of hydrogen and one of oxygen. It is a characteristic part of the hydrates, the alcohols, the oxygen acids, etc.

Source: Webster’s Unabridged Dictionary 1913 Edition