Crocodilia

from WordNet (r) 3.0 (2006)

Crocodilia
    n 1: crocodiles; alligators; caimans; gavials [syn:
         {Crocodylia}, {order Crocodylia}, {Crocodilia}, {order
         Crocodilia}]

from The Collaborative International Dictionary of English v.0.48

Crocodilia \Croc`o*dil"i*a\ (-d?l"?-?), n. pl. [NL., fr. L.
   crocodilus crocodile.] (Zool.)
   An order of reptiles including the crocodiles, gavials,
   alligators, and many extinct kinds.
   [1913 Webster]