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n. Any of various shrubs or small trees of the genus Rhus, having compound leaves, clusters of small greenish flowers, and usually red, hairy fruit. Some species, such as the poison ivy and poison oak, cause an acute itching rash on contact.

n. Any of various shrubs or small trees of the genus Rhus including the poison ivy and poison oak.

n. A sour spice popular in the Eastern Mediterranean made from the berries of the plant.

n. Any plant of the genus Rhus, shrubs or small trees with usually compound leaves and clusters of small flowers. Some of the species are used in tanning, some in dyeing, and some in medicine. One, the Japanese Rhus vernicifera, yields the celebrated Japan varnish, or lacquer.

n. The powdered leaves, peduncles, and young branches of certain species of the sumac plant, used in tanning and dyeing.

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

n. 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.

In leather manufacturing, to treat with sumac.

n. wood of a sumac

n. a shrub or tree of the genus Rhus (usually limited to the non-poisonous members of the genus)

"The offending material in all species of poison ivy, poison oak and poison sumac is an oily resin known as urushiol."

sumach   

wood   

spanish sumac    curriers' sumac    tyrol sumac    italian sumac    coral-sumac    chinese sumac    swamp-sumac    stag's-horn sumac    tanning sumac    swedish sumac   

poison sumac   

sumach    checkerberry    viburnum    manzanita    briar    wisteria    ironwood    hornbeam    barberry    persimmon