The Collaborative International Dictionary of English v.0.48:

Saccharum \Sac"cha*rum\, n. [NL. See Saccharine.] (Bot.)
   A genus of tall tropical grasses including the sugar cane.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Saccharum
    n 1: tall perennial reedlike grass originally of southeastern
         Asia: sugarcane [syn: Saccharum, genus Saccharum]