'Ichthyosauria' definitions:
Definition of 'Ichthyosauria'
(from WordNet)
noun
Extinct marine reptiles: ichthyosaurs [syn: Ichthyosauria, order Ichthyosauria]
Definition of 'Ichthyosauria'
From: GCIDE
- Ichthyosauria \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. [1913 Webster]