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Noun: western poison oak
  1. Poisonous shrub of the Pacific coast of North America that causes a rash on contact
    "Warning signs marked areas where western poison oak grew along the trail";
    - Toxicodendron diversilobum, Rhus diversiloba, poison oak

Derived forms: western poison oaks

Type of: poisonous plant

Part of: genus Toxicodendron, Toxicodendron

Encyclopedia: Western poison oak