noun
- Coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes.
- synonyms: class Hydrozoa
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). hydrozoa. Retrieved September 21, 2026, from http://smartdefine.org/hydrozoa/definitions/1197069 |
| Chicago | WordNet. 2010. "hydrozoa" http://smartdefine.org/hydrozoa/definitions/1197069 (accessed September 21, 2026). |
| Harvard | WordNet 2010, hydrozoa, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/hydrozoa/definitions/1197069>. |
| MLA | WordNet. "hydrozoa" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/hydrozoa/definitions/1197069> |