quinone

• POS: Noun
• HYPHEN: qui=none

CIDE DICTIONARY

quinone, n. [Quinine + ketone.].

 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.  [1913 Webster]

OXFORD DICTIONARY

quinone, n. Chem.
1 a yellow crystalline derivative of benzene with the hydrogen atoms on opposite carbon atoms replaced by two of oxygen.
2 any in a class of similar compounds.