Definitions

1. noun

A type of marine reptile belonging to the family Mosasauridae, which lived during the Cretaceous period.

“The museum exhibit featured a life-sized model of a mosasaur, highlighting its fearsome reputation.”

2. proper noun

A genus of extinct marine lizards within the family Mosasauridae.

“The discovery of a new mosasaur fossil in the region sparked excitement among paleontologists.”