Naphthol
Pronunciation : Naph"thol
Part of Speech : n.
Etymology : [Naphthalene + -ol.] (Chem.)
Definition : Defn: Any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol. In general they are crystalline substances with a phenol (carbolic) odor. Naphthol blue, Naphthol orange, Naphthol yellow (Chem.), brilliant dyestuffs produced from certain complex nitrogenous derivatives of naphthol or naphthoquinone.
Source : Webster's Unabridged Dictionary, 1913