Definition of "poison sumac" []

• A shrub (Toxicodendron vernix syn. Rhus vernix) typically of swampy habitats in eastern North America, having compound leaves and greenish-white berries and causing an itching rash on contact with the skin. (noun)
• A skin rash caused by contact with this plant. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.