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• n  in some classifications: comprising those members of the genus Rhus having foliage that is poisonous to the touch; of North America and northern South America

• Carefully she planted Rhus toxicodendron (poison ivy) about Venus's feet.
• The Chinese and Japanese employ a lacquer which is an extract from a Japanese plant known as Rhus vernicifera, of the same variety as Rhus toxicodendron or "poison-ivy.

• Toxicodendron
• genus Toxicodendron