Found 2 items, similar to Plesiosauria.
English → English (WordNet) Definition: Plesiosauria Plesiosauria n : any of the plesiosaurs [syn: suborder Plesiosauria]
English → English (gcide) Definition: Plesiosauria 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]