Hypertext Webster Gateway: "naphthol"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Naphthol \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.
From WordNet (r) 1.7 (wn)
naphthol
n : either of two phenols derived from naphthalene
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