Dictionary![]() ![]() guai•a•colPronunciation: (gwī'u-kōl", -kôl"), [key] —n. Pharm. 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. Also called methylcatechol. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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