guai·a·col   Pronunciation Key  (gw-kôl, -kl)
n.
A yellowish oily aromatic substance, C7H8O2, derived from guaiacum or wood creosote and used chiefly as an expectorant, antiseptic, and local anesthetic.
[guaiac(um) + -ol2.]
 
Source: The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.


Guaiacol

\Guai"a*col\, n. [Guaiacum + -ol.] (Chem.) A colorless liquid, C7H8O2, with a peculiar odor. It is the methyl ether of pyrocatechin, and is obtained by distilling guaiacum from wood-tar creosote, and in other ways. It has been used in treating pulmonary tuberculosis.
Source: Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.