A genus of harmless lizards, serpentlike in form, without legs, and with both ends so much alike that they appear to have a head at ea…
Its definition shares important concepts with this word: order, large, extinct, marine, reptiles.
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Mosasauria
An order of large, extinct, marine reptiles, found in the Cretaceous rocks, especially in America. They were serpentlike in form and in having loosely articulated and dilatable jaws, with large recurved tteth, but they had paddlelike feet. Some of them were over fifty feet long. They are, essentially, fossil sea serpents with paddles. Called also Pythonomarpha, and Mosasauria.
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