rhus

from WordNet (r) 3.0 (2006)

Rhus
    n 1: 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) [syn: {Rhus},
         {genus Rhus}]

from The Collaborative International Dictionary of English v.0.48

Rhus \Rhus\, n. [L., sumac, fr. Gr. ???.] (Bot.)
   A genus of shrubs and small treets. See {Sumac}.
   [1913 Webster]