Search Result for "ichthyosaur": 
Wordnet 3.0

NOUN (1)

1. any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs; 



The Collaborative International Dictionary of English v.0.48:

Ichthyosaur \Ich"thy*o*saur\, n. [Cf. F. ichthyosaure.]
   (Paleon.)
   One of the Ichthyosaura.
   [1913 Webster]


WordNet (r) 3.0 (2006):

ichthyosaur
    n 1: any of several marine reptiles of the Mesozoic having a
         body like a porpoise with dorsal and tail fins and paddle-
         shaped limbs