What is "markweed"

markweed \markweed\ 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.

Syn: poison ivy, poison mercury, poison oak, Toxicodendron radicans, Rhus radicans.

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 [syn: poison ivy, poison mercury, poison oak, Toxicodendron radicans, Rhus radicans]