Any of different huge extinct aquatic lizards of the genus Mosasaurus, having modified limbs that served as paddles for swimming. These lizards, considered to being viviparous and carnivorous, might very early forefathers associated with the modern monitor lizard.
An large extinct marine reptile, when you look at the family members Mosasauridae; the ancestor of contemporary snakes.
One of an extinct order of reptiles, including Mosasaurus and allied genera. See mosasauria.
an over-all title for the big, extinct marine reptiles of family Mosasauridæ, such as the well-known genera Mosasaurus, Tylosaurus, Clidastes, etc. They had long, pointed minds, rather long systems, a compressed end, and limbs changed into quick, flattened paddles. They abounded into the Cretaceous period and their stays tend to be particularly abundant in the chalk of Kansas.