Any of a class of aromatic compounds found widely in plants,especially the yellow crystalline form,CO(CHCH)2CO,used in making dyes,tanning hides,and photography.

• 醌，苯醌一种芳族化合物，广泛存在于植物中，尤指其黄色的结晶体形式CO（CHCH）2CO，用在制造染料、鞣制皮革和摄影中。