Definitions for guaiacol
A naturally occurring aromatic organic compound with the chemical formula CH(OH)(OCH), having certain medicinal applications.
Origin: guaiacum, from which it can be derived, and -ol.
U.S. National Library of Medicine
An agent thought to have disinfectant properties and used as an expectorant. (From Martindale, The Extra Pharmacopoeia, 30th ed, p747)