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. [ 1913 Webster ]
n. (Chem.) A white crystalline aromatic hydrocarbon,
Naphthalene red (Chem.),
Naphthalene yellow (Chem.),
n. (Chem.) A white crystalline aromatic hydrocarbon,
Naphthalene red (Chem.),
Naphthalene yellow (Chem.),