Naph"thol (?), n. [Naphthalene + -ol.] Chem.
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.
© Webster 1913.