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Webster 1913 Edition
Naphthol
Naph′thol
,Noun.
[
Naphth
alene + -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.