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Noun: poison oak  poy-zun owk
  1. Dermatitis resulting from contact with a poison oak plant
     
  2. 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, markweed, poison mercury, Toxicodendron radicans, Rhus radicans

Derived forms: poison oaks

Type of: poisonous plant, Rhus dermatitis

Part of: genus Toxicodendron, Toxicodendron

Encyclopedia: Poison oak