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1. (n.) poison ivy
a vine or shrub, Rhus radicans, of the cashew family, with trifoliate leaves and whitish berries: may cause allergic dermatitis when touched.
2. poison ivy
the rash caused by touching poison ivy.
Etymology: (1775–85, Amer.)
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| Definition of 'poison ivy' |
Princeton's WordNet |
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1. (noun) poison ivy
dermatitis resulting from contact with the poison ivy plant
"my poison ivy is drying up"
2. (noun) poison ivy, markweed, poison mercury, poison oak, Toxicodendron radicans, Rhus radicans
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
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