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Any of various extinct carnivorous marine reptiles of the family Mosasauridae of the Cretaceous Period, having an elongated body, powerful jaws, and paddlelike limbs. Some species reached lengths of over 15 meters (50 feet).

[New Latin Mosasaurus, genus name : Latin Mosa, the Meuse River (where fossils of the genus were first discovered) + Greek sauros, lizard.]


(ˈməʊsəˌsɔː) or


n, pl -saurs or -sauri (-ˈsɔːraɪ)
(Palaeontology) any of various extinct Cretaceous giant marine lizards of the genus Mosasaurus and related genera, typically having paddle-like limbs
[C18: from Latin Mosa the river Meuse (near which remains were first found) + -saur]


(ˈmoʊ səˌsɔr)

any of several extinct carnivorous marine lizards from the Cretaceous Period, having the limbs modified into broad, webbed paddles.
[< New Latin Mosasaurus (1823) genus name = Latin Mosa the Muse river (where first discovered) + New Latin -saurus -saur]
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The new study combined data from living and fossil species, which revealed mosasaurs to be close relatives of snakes, and only distantly related to monitor lizards and species at the base of the tree.
Palaeoenvironmental interpretations of rare earth element signatures in mosasaurs (reptilian) from the upper Cretaceous Pierre Shale, central South Dakota, USA.
During the Age of the dinosaurs, huge reptiles, such as mosasaurs and ichthyosaurs, ruled the seas.
Tylosaurus proriger is one of the largest mosasaurs (REPTILIA: SQUAMATA).
The majority of the finds so far are skulls and skeletons of turtles, sharks, plesiosaurs, and mosasaurs, as well as bones of a sauropod.
In the water there are Mosasaurs, Pterosaurs, and Plesiosaurs (Nessie
Among the largest were the long-necked plesiosaurs (PLEE-see-uh-sawrs) and the sharp-toothed mosasaurs (MOH-suh-sawrs).
Ellis profiles some of the dinosaurs that moviemaker Steven Spielberg didn't bring to life-those that swam the ancient oceans, including ichthyosaurs, plesiosaurs, pliosaurs, and mosasaurs.
Mosasaurs were various kinds of large carnivorous aquatic reptiles that lived in the Cretaceous Period (between about 68 million and 140 million years ago).
A blind man could probably identify various genera of mosasaurs (the family of marine lizards that Tylosaurus belongs to) because they didn't all have the same sort of scales.
As Dolly travels through the stages of her life, experiencing the world from her spot near the bottom of the food chain, she encounters such fellow marine creatures as long-necked pleisosaurs, giant turtles, ferocious, flippered crocs, fierce sharks, and the most dangerous "sea monsters" of all, the mosasaurs.