poison oak
1. dermatitis resulting from contact with a poison oak plant • Hypernyms: Rhus dermatitis 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 • Syn: poison ivy, markweed, poison mercury, Toxicodendron radicans, Rhus radicans • Hypernyms: poisonous plant • Member Holonyms: Toxicodendron, genus Toxicodendron
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