Mōs'o-sau'rus, n.

n. [Lat. Mosa, the River Meuse, on which Maestricht is situated, and Gr. σαῦρος, lizard.] (Palæon.) An extinct water lizard, allied to the monitor, and larger than the crocodile. Several species have been found fossil in the cretaceous formations of Europe and America. The first was discovered in beds of clay, near Maestricht, in Germany. [Written also mososaurus.]