QUINONE
quinone, benzoquinone
(noun) any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes
Source: WordNet® 3.1
Etymology
Noun
quinone (plural quinones)
(organic compound) Any of a class of aromatic compounds having two carbonyl functional groups in the same six-membered ring.
Source: Wiktionary
Qui"none, n. Etym: [Quinine + ketone.] (Chem.)
Definition: A crystalline substance, C6H4O2 (called also benzoketone), first obtained by the oxidation of quinic acid and regarded as a double ketone; also, by extension, any one of the series of which quinone proper is the type. [Written also chinone, kinone.]
Source: Webster’s Unabridged Dictionary 1913 Edition
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AIR
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