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rhus

/ (rʊs) /
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noun
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 autumnSee also sumach
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QUIZ YOURSELF ON "WAS" VS. "WERE"!
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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Medical definitions for rhus

Rhus
[ rōōs, rŭs ]

n.
A genus of vines and shrubs including several species, especially poison ivy, poison oak, and poison sumac, producing oils that can cause dermatitis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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