The Collaborative International Dictionary of English v.0.48:
Anurous \A*nu"rous\, a. (Zool.) Destitute of a tail, as the frogs and toads. [Also written anourous.] [1913 Webster]WordNet (r) 3.0 (2006):
anurous adj 1: not having a tail; "anurous toads and frogs" [syn: anurous, tailless]