鱼龙
Ichthyosaur \Ich"thy*o*saur\, n. [Cf. F. ichthyosaure.] (Paleon.) One of the Ichthyosaura.
ichthyosaur
n : any of several marine reptiles of the Mesozoic having a body
like a porpoise with dorsal and tail fins and
paddle-shaped limbs
[also: {ichthyosauruses} (pl)]