sumac

Any of various shrubs or small trees of the genera Rhus and Toxicodendron, having compound leaves, clusters of small greenish flowers, and usually red, hairy fruit. Species in the genus Toxicodendron, such as poison sumac, have toxic sap.

A tart, dark reddish-brown powder made from the ground dried fruits of a Eurasian sumac (Rhus coriaria), used as a seasoning in Middle Eastern cuisine.

In leather manufacturing, to treat with sumac.

One of numerous shrubs or small trees of the genus Rhus. See def. 2, and phrases below.

A product of the dried and ground leaves of certain shrubs or trees of the genus Rhus or of other genera, much used for tanning light-colored leathers and to some extent for dyeing.