Dictionary entry

Ichthyosauria

Webster's Dictionary 1913

‖Ich′thy‐o‐sau″ri‐a (?), n. pl. [NL. See Ichthyosaurus.] (Paleon.) An extinct order of marine reptiles, including Ichthyosaurus and allied forms; — called also Ichthyopterygia. They have not been found later than the Cretaceous period.