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