rhus

World English Dictionary
rhus (rʊs)
 
n
See also sumach any shrub or small tree of the anacardiaceous genus Rhus, several species of which are cultivated as ornamentals for their foliage, which assumes brilliant colours in autumn

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American Heritage
Medical Dictionary

Rhus (rōōs, rŭs)
n.
A genus of vines and shrubs including several species, especially poison ivy, poison oak, and poison sumac.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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