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nounin some classifications: comprising those members of the genus Rhus having foliage that is poisonous to the touch; of North America and northern South America
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Definition that contains toxicodendron
- rhus deciduous or evergreen shrubs and shrubby trees of temperate and subtropical North America, South Africa, eastern Asia and northeastern Australia; usually limited to nonpoisonous sumacs (see genus Toxicodendron)
- rhus dermatitis contact dermatitis resulting from contact with plants of the genus Toxicodendron
- genus rhus deciduous or evergreen shrubs and shrubby trees of temperate and subtropical North America, South Africa, eastern Asia and northeastern Australia; usually limited to nonpoisonous sumacs (see genus Toxicodendron)