noun
- Marine invertebrates with tube feet and five-part radially symmetrical bodies. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). echinoderm. Retrieved September 21, 2026, from http://smartdefine.org/echinoderm/definitions/1199208 |
| Chicago | WordNet. 2010. "echinoderm" http://smartdefine.org/echinoderm/definitions/1199208 (accessed September 21, 2026). |
| Harvard | WordNet 2010, echinoderm, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/echinoderm/definitions/1199208>. |
| MLA | WordNet. "echinoderm" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/echinoderm/definitions/1199208> |