Pronunciation: (kwi-nōn', kwin'ōn), [key]
1. a yellow, crystalline, cyclic unsaturated diketone, C6H4O2, formed by oxidizing aniline or hydroquinone: used chiefly in photography and in tanning leather.
2. any of a class of compounds of this type. Also,chinone.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.