The story
From scientific Latin Mosasaurus (genus name).
First known use, by meaning
- from c. 1840 A large extinct marine reptile in the family †Mosasauridae, dominant marine predator of the Cretaceous. Mosasaurs are considered to belong to Squamata, the same group that includes lizards and snakes.
Etymology from Wiktionary, CC BY-SA 4.0.