plesiosaurus

Noun
Synonyms: plesiosaur

WordNet 3.0

Noun (1)

  1. extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and CretaceousSynonyms: plesiosaur
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Webster's Dictionary (GCIDE)

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]
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