Search Result for "plesiosauria": 
Wordnet 3.0

NOUN (1)

1. any of the plesiosaurs;
[syn: Plesiosauria, suborder Plesiosauria]



The Collaborative International Dictionary of English v.0.48:

Plesiosauria \Ple`si*o*sau"ri*a\, n. pl. [NL. See
   Plesiosaurus.] (Paleon.)
   An extinct order of Mesozoic marine reptiles including the
   genera Plesiosaurus, and allied forms; -- called also
   Sauropterygia.
   [1913 Webster]


WordNet (r) 3.0 (2006):

Plesiosauria
    n 1: any of the plesiosaurs [syn: Plesiosauria, suborder
         Plesiosauria]