poison ivy(redirected from poison oakpoison sumac)
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1. A North American shrub or vine (Toxicodendron radicans) that has compound leaves with three leaflets, small green flowers, and whitish berries and that causes a rash on contact.
2. A skin rash caused by contact with this plant. In both senses also called poison oak.
(Plants) any of several North American anacardiaceous shrubs or vines of the genus Rhus (or Toxicodendron), esp R. radicans, which has small green flowers and whitish berries that cause an itching rash on contact. See also sumach1
1. a vine or shrub, Rhus radicans, of the cashew family, with trifoliate leaves and whitish berries: may cause allergic dermatitis when touched.
2. poison oak.
3. the rash caused by touching poison ivy.
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|Noun||1.||poison ivy - dermatitis resulting from contact with the poison ivy plant; "my poison ivy is drying up"|
Rhus dermatitis - contact dermatitis resulting from contact with plants of the genus Toxicodendron
|2.||poison ivy - 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|
genus Toxicodendron, Toxicodendron - in some classifications: comprising those members of the genus Rhus having foliage that is poisonous to the touch; of North America and northern South America
poisonous plant - a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism