poison oak

/ˌpɔɪzn oʊk/

Other forms: poison oaks

Definitions of poison oak

1. noun

   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
   synonyms: Rhus radicans, Toxicodendron radicans, markweed, poison ivy, poison mercury

   type of:

   poisonous plant

   a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism
2. noun

   dermatitis resulting from contact with a poison oak plant
   type of:

   Rhus dermatitis

   contact dermatitis resulting from contact with plants of the genus Toxicodendron