• synonyms


[gwahy-uh-kohl, -kawl]
noun Pharmacology.
  1. a slightly yellowish, aromatic, crystalline substance, C7H8O2, resembling creosote and usually obtained from guaiacum resin: used in medicine chiefly as an expectorant and local anesthetic.
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Origin of guaiacol

First recorded in 1860–65; guaiac(um) + -ol2
Also called methylcatechol.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for guaiacol

Historical Examples of guaiacol

  • Similarly the carbonate of guaiacol may be given in doses even as large as a drachm.

    Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6


  • Alcohol, m. 21⁄2; Creosote and Guaiacol sulphonates of each, gr.

  • Luff recommends the administration over long periods of guaiacol carbonate, in cachets beginning with doses of 5–10 grs.

    Manual of Surgery

    Alexis Thomson and Alexander Miles

British Dictionary definitions for guaiacol


  1. a yellowish oily creosote-like liquid extracted from guaiacum resin and hardwood tar, used medicinally as an expectorant. Formula: C 7 H 8 O 2
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Word Origin for guaiacol

from guaiac (um) + -ol ²
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

guaiacol in Medicine


(gwīə-kôl′, -kōl′)
  1. A yellowish, oily, aromatic substance derived from guaiacum or wood creosote and used chiefly as an expectorant, a local anesthetic, and an antiseptic.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.