Plesiosauri

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Plesiosaurus \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.
     [1913 Webster]