Quinone n. : 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.

Example:
A 0.1964 g sample of Quinone (C6H4O2) is burned in a bomb calorimeter that has a heat capacity of 1.56 kJ/°C.

Taxonomy
quinone, Quinones, free encyclopedia, hydroquinone, DDQ, Benzoquinone, dione, aromatic compounds, oxidized, Oxidizing agents, search, callsign, TV station, Toowoomba, Queensland, Queensland, Australia, cyclic, benzoquinones, conversion.

Defination from the web:
quinone is in the spray of bombardier beetles; hydroquinone is reacted with hydrogen ... Stronger quinone oxidising agents exist; for instance: 2,3,5,6-tetrachloro-parabenzoquinone (also known as p-chloranil) and 2,3-dichloro-5,6 ...