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rhus

/rʊs/
noun
1.
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 See also sumach
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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rhus in Medicine

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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