\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}.]