quinone

Qui"none, n. Etym: [Quinine + ketone.] (Chem.) Defn: 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.]

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