noun
- Extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous.
- synonyms: plesiosaur
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). plesiosaurus. Retrieved September 21, 2026, from http://smartdefine.org/plesiosaurus/definitions/1302685 |
| Chicago | WordNet. 2010. "plesiosaurus" http://smartdefine.org/plesiosaurus/definitions/1302685 (accessed September 21, 2026). |
| Harvard | WordNet 2010, plesiosaurus, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/plesiosaurus/definitions/1302685>. |
| MLA | WordNet. "plesiosaurus" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/plesiosaurus/definitions/1302685> |