hydrozoa

Noun

Hy=dro=zo=a

WORDNET DICTIONARY

hydrozoa(n = noun.animal) class hydrozoa - coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes;

is a member of cnidaria, coelenterata, phylum cnidaria, phylum coelenterata

is a kind of class

hydrozoa, n. pl. [NL., fr. E. hydra + Gr. zo^,on an animal.].

The Acalephæ; one of the classes of cœlenterates, including the Hydroidea, Discophora, and Siphonophora. [1913 Webster]