beta-naphthol

[ bey-tuh-naf-thawl, -thol, -nap- or, esp. British, bee- ]
/ ˌbeɪ təˈnæf θɔl, -θɒl, -ˈnæp- or, esp. British, ˌbi- /

noun Chemistry.

naphthol.

Origin of beta-naphthol

beta + naphthol

Words nearby beta-naphthol

beta-hemolytic streptococci, beta-indoleacetic acid, beta-lactam, beta-lactamase, beta-lipoprotein, beta-naphthol, beta-naphthyl group, beta-naphthylamine, beta-oxidation, beta-receptor, beta-test

Definition for beta-naphthol (2 of 2)

naphthol
[ naf-thawl, -thol, nap- ]
/ ˈnæf θɔl, -θɒl, ˈnæp- /

noun Chemistry.

either of two isomeric hydroxyl derivatives, C10H7OH, of naphthalene (alpha-naphthol or 1-naphthol and beta-naphthol or 2-naphthol), white or yellowish crystals, with a phenolic odor, that darken on exposure to light: used chiefly in dyes, drugs, perfumes, and insecticides.
Also called hydroxynaphthalene.

Origin of naphthol

First recorded in 1840–50; naphth- + -ol1

Example sentences from the Web for beta-naphthol

British Dictionary definitions for beta-naphthol

naphthol
/ (ˈnæfθɒl, ˈnæp-) /

noun

a white crystalline solid having two isomeric forms, alpha-naphthol, used in dyes, and beta-naphthol, used in dyes and as an antioxidant. Formula: C 10 H 7 OH

Word Origin for naphthol

C19: from naphtha + -ol 1

Medical definitions for beta-naphthol

naphthol
[ năf′thôl′, -thōl′, năp′- ]

n.

An organic compound occurring in two isomeric forms, alpha-naphthol and beta-naphthol. naphthalenol

Scientific definitions for beta-naphthol

naphthol
[ năf′thôl′, -thōl′, năp′- ]

A poisonous organic compound occurring in two isomeric forms. Both isomers are important in the manufacture of dyes, and also in making antiseptics, insecticides, and tanning agents. Naphthol consists of a hydroxyl group (OH) attached to naphthalene. Chemical formula: C10H8O.