Sentence:  Tannin or tannic acid is a vegetable principle produced from nut-galls, catechu, or cutch, or terra japonica, oak-bark, divi divi, or the pod of the corsalpin coriaria, valonia, or the cup of the acorn from the prickly oak, <WSD>sumack</WSD>, cork-tree bark, mimosa, or wattle bark, larch  bark, and many other astringent vegetable substances. This vegetable principle is employed in tanning leather. 
Meaning of the word marked with <WSD> tags:  Any of various shrubs or small trees of the genus "Rhus" and other genera in Anacardiaceae, particularly the (elm-leaved sumac), (Sicilian sumac), or (tanner's sumac) ("Rhus coriaria").