Noun | 1. | Rhus dermatitis - contact dermatitis resulting from contact with plants of the genus Toxicodendron contact dermatitis - a delayed type of allergic reaction of the skin resulting from skin contact with a specific allergen (such as poison ivy) poison ivy - dermatitis resulting from contact with the poison ivy plant; "my poison ivy is drying up" poison oak - dermatitis resulting from contact with a poison oak plant poison sumac - dermatitis resulting from contact with a poison sumac plant |