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Noun: plesiosaurus
  1. Extinct marine reptile with a small head on a long neck and a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous
    - plesiosaur

Derived forms: plesiosauruses

Type of: archosaur, archosaurian, archosaurian reptile

Part of: genus Plesiosaurus

Encyclopedia: Plesiosaurus