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).

(transitive) To apply a preparation of sumac to (an object), for example, to a piece of leather to tan it.

Third-person singular simple present indicative form of sumac

plural of sumac

simple past tense and past participle of sumac

gerund of sumac: the process of applying a preparation of sumac to an object.

present participle of sumac

A woody shrub or small tree, all parts of which cause irritation to humans; Toxicodendron vernix, formerly Rhus vernix.

plural of poison sumac

A large Mediterranean shrub, Rhus coriaria, formerly used for tanning hides due to the tannins in its bark, and with acidic fruits used as a tart seasoning in Middle Eastern food.