Anura

WORDNET DICTIONARY

anura(n = noun.animal) batrachia, order anura, order batrachia, order salientia, salientia - frogs, toads, tree toads;

is a kind of animal order

is a member of amphibia, class amphibia

Anura, n. pl. [NL., fr. Gr. 'an priv. + o'yra` a tail.].

One of the orders of amphibians characterized by the absence of a tail, as the frogs and toads. [1913 Webster]