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nounextinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous
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Definition that contains plesiosaur
- nessie a large aquatic animal supposed to resemble a serpent or plesiosaur of Loch Ness in Scotland
- nothosaur extinct marine reptile with longer more slender limbs than plesiosaurs and less completely modified for swimming
- archosaur extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts
- subclass archosauria a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
- genus plesiosaurus a reptile genus of suborder Plesiosauria
- order sauropterygia extinct marine reptiles: plesiosaurs; nothosaurs
- archosauria a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
- suborder plesiosauria any of the plesiosaurs
- loch ness monster a large aquatic animal supposed to resemble a serpent or plesiosaur of Loch Ness in Scotland
- plesiosauria any of the plesiosaurs