<chemistry> Any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol. In general they are crystalline substances with a phenol (carbolic) odour.

<chemistry> Naphthol blue, Naphthol orange, Naphthol yellow, brilliant dyestuffs produced from certain complex nitrogenous derivatives of naphthol or naphthoquinone.

Origin: Naphthalene + -ol.

(01 Mar 1998)