The Collaborative International Dictionary
Naphthalenic
Naphthalenic \Naph`tha*len"ic\, a. (Chem.) Pertaining to, or derived from, naphthalene; -- used specifically to designate a yellow crystalline substance, called naphthalenic acid and also hydroxy quinone, and obtained from certain derivatives of naphthol.
Wiktionary
naphthalenic
a. (context chemistry English) Pertaining to, or derived from, naphthalene.