ichthyosaur

Borrowed from translingual Ichthyosaurus, equivalent to ichthyo- +‎ -saur.

• IPA^(key): /ˈɪkθiəsɔːɹ/

ichthyosaur (plural ichthyosaurs)

1. Any fishlike marine reptiles of the extinct order †Ichthyosauria of the early Triassic to the late Cretaceous period, that had a body somewhat like a porpoise. [from c. 1830]
   • 2013, F. Crescitelli, The Visual System in Vertebrates, page 27:

     The most striking marine reptiles are the fishlike or porpoiselike ichthyosaurs.

• ichthyosaurus