ichthyosaur — ONAD

ichthyosaur /ˈikTHēəˌsôr, ˈɪkθiəˌsɔr

/ (also ichthyosaurus /ˌikTHēəˈsôrəs/)

▸ noun an extinct marine reptile of the Mesozoic era resembling a dolphin, with a long pointed head, four flippers, and a vertical tail.

Order Ichthyosauria, subclass Diapsida: numerous genera, including Ichthyosaurus.

– DERIVATIVES
ichthyosaurian /ˌikTHēəˈsôrēən/ adjective

– ORIGIN mid 19th century : from ichthyo- ‘fish’ + Greek sauros ‘lizard’.