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phenol

[fee-nawl, -nol]

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noun Chemistry.

Also called carbolic acid, hydroxybenzene, oxybenzene, phenylic acid. a white, crystalline, water-soluble, poisonous mass, C₆H₅OH, obtained from coal tar, or a hydroxyl derivative of benzene: used chiefly as a disinfectant, as an antiseptic, and in organic synthesis.

any analogous hydroxyl derivative of benzene.

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Origin:
1850–55; phen- + -ol¹

Related forms

phe·no·lic

[fi-noh-lik, -nol-ik] , adjective

non·phe·no·lic, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Phenol is always a great word to know.

So is unstable. Does it mean:

noting compounds that readily decompose or change into other compounds

like or containing an alkali, which neutralize acids to form salts and turn red litmus paper blue, or having a pH value greater than 7

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Collins

World English Dictionary

phenol (ˈfiːnɒl)

—n
1.	Also called: carbolic acid a white crystalline soluble poisonous acidic derivative of benzene, used as an antiseptic and disinfectant and in the manufacture of resins, nylon, dyes, explosives, and pharmaceuticals; hydroxybenzene. Formula: C₆H₅OH
2.	chem any of a class of weakly acidic organic compounds whose molecules contain one or more hydroxyl groups bound directly to a carbon atom in an aromatic ring

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage

Medical Dictionary

phenol phe·nol (fē'nôl', -nōl')
n.

A caustic, poisonous, white crystalline compound derived from benzene and used in pharmaceuticals and in dilute form as an antiseptic. Also called carbolic acid, phenic acid.
Any of a class of aromatic organic compounds having at least one hydroxyl group attached directly to the benzene ring.

American Heritage

Science Dictionary

phenol (fē'nôl', -nōl') Pronunciation Key

Any of a class of organic compounds that contain a hydroxyl group (OH) attached to a carbon atom that is part of an aromatic ring. Phenols are similar to alcohols but are more soluble in water, and occur as colorless solids or liquids at room temperature. Some phenols occur naturally in the essential oils of plants. Phenols are used in industry to make plastics and detergents.
The simplest phenol, consisting of a benzene ring attached to a hydroxyl group (OH). It is a poisonous, white, crystalline compound and is used to make plastics and drugs. Also called carbolic acid. Chemical formula: C₆H₆O.

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