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).
Dried and chopped-up leaves and stems of a plant of the genus Rhus, particularly the tanner's sumac (see sense 1), used for dyeing and tanning leather or for medicinal purposes.
The noun is derived from Middle English sumac, asimac, simak, sumak, symak, from Anglo-Norman sumak, symak, and Old French sumac, or directly from its etymon Medieval Latin sumach, sumac, from Arabic سُمَّاق, from Classical Syriac ܣܘܡܩܐ ("red; sumac"). The English word is cognate with Italian sommaco, sommacco, Occitan simac, Portuguese sumagre, Spanish zumaque.
The verb is derived from the noun.
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