Ple`si*o*sau"rus (?), n.; pl. Plesiosauri (#). [NL., fr. Gr near + a lizard.] Paleon.

A genus of large extinct marine reptiles, having a very long neck, a small head, and paddles for swimming. It lived in the Mesozoic age.

 

© Webster 1913.

Log in or registerto write something here or to contact authors.