The Collaborative International Dictionary of English v.0.48:

Triticum \Trit"i*cum\, n. [L., perhaps fr. tritus, p. p. of
   terere to grind.] (Bot.)
   A genus of grasses including the various species of wheat.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Triticum
    n 1: annual cereal grasses from Mediterranean area; widely
         cultivated in temperate regions [syn: Triticum, genus
         Triticum]