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
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SENSE
(noun) the faculty through which the external world is apprehended; “in the dark he had to depend on touch and on his senses of smell and hearing”
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