EXAMPLES | WORD ORIGIN noun a colorless, crystalline, dihydroxyl derivative of benzene, C 6H 6O 2, the ortho isomer, used chiefly in photography, for dyeing, and as a reagent; pyrocatechol.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for catechol Historical Examples of catechol
Tanning materials are divided into two main classes: Pyrogallol,
These skins are tanned with turwar bark, which contains a
The other is called the
catechol group and is strongly condemned. Catechol tans, often obtained from barks, contain usually about 60 per cent.
It is a
catechol tan of peculiarly mellow quality and great practical value. British Dictionary definitions for catechol noun a colourless crystalline phenol found in resins and lignins; 1,2-dihydroxybenzene. It is used as a photographic developer. Formula: C 6 H 4 (OH) 2 Also called: pyrocatechol Word Origin for catechol
catechu + -ol 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
catechol [kăt ′ĭ-kôl′, -kōl′]
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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: C 6H 6O 2.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.