A glycoside from the bark of several species of Betula (birch); it yields methyl salicylate, d-glucose, and d-xylose on hydrolysis. ... (05 Mar 2000) ... 
Type: Term Pronunciation: gawl′thĕ-rin Definitions: 1. A glycoside from the bark of several species of Betula (birch); it yields methyl salicylate, d-glucose, and d-xylose on hydrolysis.