(n.) An extinct genus of marine reptiles; -- so named from their short, biconcave vertebrae, resembling those of fishes. Several species, varying in length from ten to thirty feet, are known from the Liassic, Oolitic, and Cretaceous formations.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). ichthyosaurus. Retrieved September 21, 2026, from http://smartdefine.org/ichthyosaurus/definitions/2018654 |
| Chicago | Webster's. 2011. "ichthyosaurus" http://smartdefine.org/ichthyosaurus/definitions/2018654 (accessed September 21, 2026). |
| Harvard | Webster's 2011, ichthyosaurus, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/ichthyosaurus/definitions/2018654>. |
| MLA | Webster's. "ichthyosaurus" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/ichthyosaurus/definitions/2018654> |