(n.pl.) An extinct order of marine reptiles, including Ichthyosaurus and allied forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). ichthyosauria. Retrieved September 29, 2026, from http://smartdefine.org/ichthyosauria/definitions/2018652 |
| Chicago | Webster's. 2011. "ichthyosauria" http://smartdefine.org/ichthyosauria/definitions/2018652 (accessed September 29, 2026). |
| Harvard | Webster's 2011, ichthyosauria, Smart Define, viewed 29 September, 2026, <http://smartdefine.org/ichthyosauria/definitions/2018652>. |
| MLA | Webster's. "ichthyosauria" 27 May 2011. Web. 29 September 2026. <http://smartdefine.org/ichthyosauria/definitions/2018652> |