poison ivy
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- any of several woody vines or shrubs (genus Rhus, esp. R. radicans), of the cashew family, having leaves of three leaflets, greenish flowers, and ivory-colored berries: it can cause a severe rash on contact
- a rash or dermatitis so caused
See poison ivy in American Heritage Dictionary 4
noun In both senses also called
poison oak.
- A North American shrub or vine (Toxicodendron radicans syn. Rhus radicans) that has compound leaves with three leaflets, small green flowers, and whitish berries and that causes a rash on contact.
- A skin rash caused by contact with this plant.
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