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quinone 醌 □ quinone n 1: any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes [synonym: {quinone}, {benzoquinone}] Quinone \Qui"none\, n. [Quinine ketone.] (Chem.)
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}.] [1913 Webster]
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