1. Smooth American swamp shrub with pinnate leaves and greenish flowers followed by greenish white berries; yields an irritating oil
   "Hikers carefully avoided the poison sumac in the wetland";
   - poison ash, poison dogwood, Toxicodendron vernix, Rhus vernix
    
2. Dermatitis resulting from contact with a poison sumac plant
   "The camper unknowingly brushed against poison sumac, resulting in an itchy rash"

Derived forms: poison sumacs

Type of: poisonous plant, Rhus dermatitis

Part of: genus Toxicodendron, Toxicodendron

Encyclopedia: Poison sumac