( n. )
Any one of a group of quinone compounds obtained respectively by the oxidation of certain xylidine compounds. In general they are yellow crystalline substances.
( n. )
Any one of a group of quinone compounds obtained respectively by the oxidation of certain xylidine compounds. In general they are yellow crystalline substances.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012