Definition of plesiosaur
: any of an order or suborder (Plesiosauria) of large carnivorous marine reptiles of the Mesozoic with dorsoventrally flattened bodies and limbs modified into flippers
Recent Examples of plesiosaur from the Web
The plesiosaurs - a group of marine reptiles including the pliosaurs - were thought to feed primarily on large marine animals and fish.
Pliosaurs are a kind of plesiosaur, characterised by a large, two-metre-long skull, enormous teeth and extremely powerful jaws, making them the top ocean predators during the dinosaur age.
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Origin and Etymology of plesiosaur
ultimately from Greek plēsios close (akin to Greek pelas near) + sauros lizard
First Known Use: 1839See Words from the same year
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