DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   sumac
       n 1: wood of a sumac
       2: a shrub or tree of the genus Rhus (usually limited to the
          non-poisonous members of the genus) [syn: sumac, sumach,
          shumac]