1. Hydrozoa

noun. Coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes.
Synonyms
phylum Coelenterata Coelenterata Cnidaria genus Hydra hydrozoan class class Hydrozoa hydroid Sertularia Siphonophora phylum Cnidaria order Siphonophora genus Sertularia
Antonyms
inelegance
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