Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun hydrozoan

1 sense of hydrozoan

Sense 1
hydrozoan, hydroid -- (colonial coelenterates having the polyp phase dominant)
       => coelenterate, cnidarian -- (radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms)