Nearby Words

alpha naphthol

[al-fuh-naf-thawl, -thol, -nap-]

al·pha-naph·thol

[al-fuh-naf-thawl, -thol, -nap-]
noun Chemistry.
See under naphthol.
Dictionary.com Unabridged

naph·thol

[naf-thawl, -thol, nap-]
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.


Origin:
1840–50; naphth- + -ol1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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American Heritage
Medical Dictionary

naphthol naph·thol (nāf'thôl', -thōl', nāp'-) or naph·tol (-tôl, -tōl)
n.
An organic compound occurring in two isomeric forms, alpha-naphthol and beta-naphthol. Also called naphthalenol.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
naphthol   (nāf'thôl', -thōl', nāp'-)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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