Definitions for ichthyosaurˈɪk θi əˌsɔr
Random House Webster's College Dictionary
ich•thy•o•saurˈɪk θi əˌsɔr(n.)
any large fishlike reptile of the extinct order Ichthyosauria, having four flippers and a prominent caudal fin.
Origin of ichthyosaur:
1820–30; < NL
any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs
Any of several extinct fishlike reptiles, of the order Ichthyosauria, that had a body somewhat like a porpoise.
Origin: Adaptation of modern Latin ichthyosaurus.
one of the Ichthyosaura