(n.pl.) A comprehensive group equivalent to the true Coelenterata, i. e., exclusive of the sponges. They are so named from presence of stinging cells (cnidae) in the tissues. See Coelenterata.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). cnidaria. Retrieved September 23, 2026, from http://smartdefine.org/cnidaria/definitions/1988397 |
| Chicago | Webster's. 2011. "cnidaria" http://smartdefine.org/cnidaria/definitions/1988397 (accessed September 23, 2026). |
| Harvard | Webster's 2011, cnidaria, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/cnidaria/definitions/1988397>. |
| MLA | Webster's. "cnidaria" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/cnidaria/definitions/1988397> |