noun
- Coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes.
- synonyms: Hydrozoa
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). class hydrozoa. Retrieved September 22, 2026, from http://smartdefine.org/class_hydrozoa/definitions/1265836 |
| Chicago | WordNet. 2010. "class hydrozoa" http://smartdefine.org/class_hydrozoa/definitions/1265836 (accessed September 22, 2026). |
| Harvard | WordNet 2010, class hydrozoa, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/class_hydrozoa/definitions/1265836>. |
| MLA | WordNet. "class hydrozoa" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/class_hydrozoa/definitions/1265836> |