The Collaborative International Dictionary of English v.0.48:

Rana \Ra"na\ (r[=a]"n[.a]), n. [L., a frog.] (Zool.)
   A genus of anurous batrachians, including the common frogs.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Rana
    n 1: type genus of the Ranidae [syn: Rana, genus Rana]