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Pronunciation: (kwi-nōn', kwin'ōn), [key]
n. Chem.
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.

quinolinequinone diimine
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