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poison ivy
 
Noun poison ivy has 2 senses
  1. poison ivy - dermatitis resulting from contact with the poison ivy plant; "my poison ivy is drying up"
    --1 is a kind of     Rhus dermatitis
  2. 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
    --2 is a kind of poisonous plant
    --2 is a member of Toxicodendron, genus Toxicodendron
poison poison arrow plant poison ash poison bush poison camas poison dogwood poison gas poison hemlock poison ivy poison mercury poison milkweed poison oak poison parsley poison pea poison pill poison sumac poisonberry

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