Xenopus
         n 1: an African clawed frog; in some classifications made the
               type genus of a separate family Xenopodidae [syn:
               {Xenopus}, {genus Xenopus}]

English Dictionary: Xenopus laevis	by the DICT Development Group
From WordNet (r) 3.0 (2006) [wn]:
Xenopus laevis n a tongueless frog native to Africa; established in the United States as result of release of laboratory and aquarium animals Synonym(s): African clawed frog, Xenopus laevis