Definition of mosasaur
: any of a family (Mosasauridae) of very large extinct marine fish-eating lizards of the Upper Cretaceous with limbs modified into paddles that are related to the recent monitor lizards
Recent Examples of mosasaur from the Web
The mosasaur’s skull sat in the prep lab of the New Jersey State Museum.
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Origin and Etymology of mosasaur
New Latin Mosasaurus, from Latin Mosa the river Meuse + Greek sauros lizard
First Known Use: 1841See Words from the same year
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Britannica.com: Encyclopedia article about mosasaur
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