mosasaur
(noun)
noun
1. An large extinct marine reptile in the family Mosasauridae, dominant marine predator of the Cretaceous; the ancestor of modern snakes. [from c. 1840]
(noun)
1. An large extinct marine reptile in the family Mosasauridae, dominant marine predator of the Cretaceous; the ancestor of modern snakes. [from c. 1840]