The Collaborative International Dictionary of English v.0.48:

Secale \Se*ca"le\, n. [L., a kind of grain.] (Bot.)
   A genus of cereal grasses including rye.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Secale
    n 1: cereal grass widely cultivated for its grain: rye [syn:
         Secale, genus Secale]