Found 2 items, similar to Plesiosaurus.
English → English (WordNet) Definition: plesiosaurus plesiosaurus n : extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous [syn: plesiosaur]
English → English (gcide) Definition: Plesiosaurus Plesiosaurus \Ple`si*o*sau"rus\, n.; pl. Plesiosauri. [NL., fr. Gr ? near + ? a lizard.] (Paleon.) A genus of large extinct marine reptiles, having a very long neck, a small head, and paddles for swimming. It lived in the Mesozoic age. [1913 Webster]