class_hydrozoa | ||
1. | [ noun ] (biology,zoology) coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes | |
Synonyms: | Hydrozoa | |
Related terms: | class Cnidaria Siphonophora Sertularia genus_Hydra hydrozoan | |