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Noun: markweed
  1. 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
    - poison ivy, poison mercury, poison oak, Toxicodendron radicans, Rhus radicans

Derived forms: markweeds

Type of: poisonous plant

Part of: genus Toxicodendron, Toxicodendron