“+ noun
Etymology: International Scientific Vocabulary naphthyl + amine
: either of two crystalline bases C 10 H 7 NH 2 that are amino derivatives of naphthalene and are used chiefly as dye intermediates:
a. : the alpha or 1-derivative made usually by reduction of alpha-nitronaphthalene
b. : the carcinogenic beta or 2-derivative made usually from beta-naphthol, ammonia, and ammonium sulfite