poison ivy

Noun poison ivy has 2 senses

• poison ivy(n = noun.state) - dermatitis resulting from contact with the poison ivy plant; "my poison ivy is drying up"
is a kind of rhus dermatitis

• poison ivy(n = noun.plant) markweed, poison mercury, poison oak, rhus radicans, toxicodendron 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;
is a member of genus toxicodendron, toxicodendron
is a kind of poisonous plant