The Collaborative International Dictionary
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 the past for treating pulmonary tuberculosis.
Wiktionary
n. (context organic compound English) A naturally occurring aromatic organic compound with the chemical formula C6H4(OH)(OCH3), having certain medicinal applications.
Wikipedia
Guaiacol is a naturally occurring organic compound with the formula CH(OH)(OCH), first isolated by Otto Unverdorben in 1826. Although it is biosynthesized by a variety of organisms, this yellowish aromatic oil is usually derived from guaiacum or wood creosote. Samples darken upon exposure to air and light. Guaiacol is present in wood smoke, resulting from the pyrolysis of lignin. The compound contributes to the flavor of many compounds, e.g., roasted coffee.
Usage examples of "guaiacol".
However, much relief is obtained from the use of steam atomizers filled with an aqueous solution of compound tincture of benzoin, creosote or guaiacol.