noun mo·sa·saur \ˈmō-zə-ˌsr\

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

Origin of MOSASAUR

New Latin Mosasaurus, from Latin Mosa the river Meuse + Greek sauros lizard
First Known Use: 1841


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