class Hydrozoa

Thesaurus

Noun

1.

class Hydrozoa - coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishesHydrozoaCnidaria, Coelenterata, phylum Cnidaria, phylum Coelenterata - hydras; polyps; jellyfishes; sea anemones; coralshydroid, hydrozoan - colonial coelenterates having the polyp phase dominantgenus Hydra - hydrasorder Siphonophora, Siphonophora - marine colonial hydrozoansgenus Sertularia, Sertularia - sessile hydroid that forms feathery coloniesclass - (biology) a taxonomic group containing one or more orders