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poison sumac

a shrub or small tree, Rhus vernix (or Toxicodendron vernix), of swampy areas of the eastern U.S., having pinnate leaves and causing severe dermatitis when touched by persons sensitive to it.
Also called poison dogwood.
Origin of poison sumac
First recorded in 1810-20 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for poison sumac
Historical Examples
  • The same remarks apply to the effects of the poison ivy and poison sumac.

    Special Report on Diseases of the Horse United States Department of Agriculture
  • The staghorn is not to be confounded with its treacherous sister, the poison sumac, with her corpse-colored berries.

    Everyday Adventures Samuel Scoville
  • False hellebore was abundant, and on the very top stood a poison sumac—a typical bog plant.

    In the Open Stanton Davis Kirkham
poison sumac in Medicine

poison sumac n.
A swamp shrub of the southeast United States, having compound leaves and greenish-white berries and causing an itching rash on contact with the skin.

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