markweed

Century Dictionary and Cyclopedia

1. n. The poison-ivy, Rhus radicans.

GNU Webster's 1913

1. n. A climbing plant (Toxicodendron radicans) common in eastern and central U. S. with ternate leaves and greenish flowers followed by white berries. It yields an irritating oil that causes a rash on contact; commonly called poison ivy.

WordNet 3.0

1. n. climbing plant common in eastern and central United States with ternate leaves and greenish flowers followed by white berries; yields an irritating oil that causes a rash on contact