plesiosaurus

(redirected from Plesiosauridae)
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Noun1.Plesiosaurus - extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbsplesiosaurus - extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous
archosaur, archosaurian, archosaurian reptile - extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts
genus Plesiosaurus - a reptile genus of suborder Plesiosauria