catechol

[kat-i-kawl, -kol]
noun
a colorless, crystalline, dihydroxyl derivative of benzene, C 6 H 6 O 2 , the ortho isomer, used chiefly in photography, for dyeing, and as a reagent; pyrocatechol.

Origin:
1875–80; catech(u) + -ol1

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World English Dictionary
catechol (ˈkætɪˌtʃɒl, -ˌkɒl)
 
n
Also called: pyrocatechol a colourless crystalline phenol found in resins and lignins; 1,2-dihydroxybenzene. It is used as a photographic developer. Formula: C6H4(OH)2
 
[C20: from catechu + -ol1]

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American Heritage
Medical Dictionary

catechol cat·e·chol (kāt'ĭ-kôl', -kōl')
n.
See pyrocatechol.

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
catechol   (kāt'ĭ-kôl', -kōl')  Pronunciation Key 
A biologically important organic phenol occurring naturally in lignins and resins. It has two hydroxyl groups attached to a benzene ring. Catechol is very caustic and is used in dyeing and as a photographic developer and an antiseptic. Chemical formula: C6H6O2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Exposure to catechol may occur during its manufacture and use.
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