hydrozoan

hy·dro·zo·an  (hdr-zn)

n.

Any of numerous coelenterates of the class Hydrozoa, including the freshwater hydras, hydroids, hydrocorals, and siphonophores.

adj.

Of, relating to, or belonging to the class Hydrozoa.

---

[From New Latin Hydroza, class name : hydro- + -za, pl. of -zon, -zoon.]

Thesaurus

Noun

1.

hydrozoan - colonial coelenterates having the polyp phase dominant hydroid cnidarian, coelenterate - radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms planula - the flat ciliated free-swimming larva of hydrozoan coelenterates class Hydrozoa, Hydrozoa - coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes hydra - small tubular solitary freshwater hydrozoan polyp siphonophore - a floating or swimming oceanic colony of polyps often transparent or showily colored sertularian - feathery colony of long-branched stems bearing stalkless paired polyps