ˈindəˌmēn, -_mə̇n noun
Etymology: International Scientific Vocabulary ind- (II) + amine; originally formed as German indamin
: any of a class of organic bases that are amino-phenyl derivatives of quinone diimine, that in the form of salts are unstable blue and green dyes, and that are used chiefly as intermediates for azine dyes (as safranines) ; especially : the simplest base NH 2 C 6 H 4 N . C 6 H 4 . NH that is the parent compound of the class