| toxicodendron | A genus (formerly rhus) of shrubs, vines, or trees that yields a highly allergenic oleoresin which causes a severe contact dermatitis. The most toxic species are toxicodendron vernix (poison sumac), t. Diversilobum (poison oak), and t. Radicans (poison ivy). T. Vernicifera yields a useful varnish from which certain enzymes (laccases) are obtained. (12 Dec 1998) |
|---|
| Rhus toxicodendron antigen | An extract of fresh leaves of poison ivy, with 0.4% of procaine hydrochloride; used by intradermal injection to determine sensitiveness to the poison of Rhus toxicodendron. (05 Mar 2000) |
|---|---|
| dermatitis, toxicodendron | An allergic contact dermatitis caused by exposure to plants of the genus toxicodendron (formerly rhus). These include poison ivy, poison oak, and poison sumac, all plants that contain the substance urushiol, a potent skin sensitizing agent. (12 Dec 1998) |