| ̷ ̷ ̷ ̷ at nitro- + noun
Etymology: International Scientific Vocabulary nitr- + naphthalene
: either of two yellow crystalline compounds C 10 H 7 NO 2 :
a. : the alpha or 1-isomer made by direct nitration of naphthalene and used in making alpha-naphthylamine
b. : the beta or 2-isomer made indirectly (as by nitration of tetrahydronaphthalene followed by dehydrogenation)