資料來源 : pyDict

水螅蟲類

資料來源 : Webster's Revised Unabridged Dictionary (1913)

{Molluscoidea}, including Brachiopoda and Bryozoa. {Mollusca},
including Cephalopoda, Gastropoda, Pteropoda, Scaphopoda,
Lamellibranchiata or Acephala. {Echinodermata}, including
Holothurioidea, Echinoidea, Asterioidea, Ophiuroidea, and
Crinoidea. {C[oe]lenterata}, including {Anthozoa} or {Polyps},
{Ctenophora}, and {Hydrozoa} or Acalephs. {Spongiozoa} or
{Porifera}, including the sponges.

Hydrozoa \Hy`dro*zo"a\, n. pl. [NL., fr. E. hydra + Gr. ? an
   animal.] (Zo["o]l.)
   The Acaleph[ae]; one of the classes of c[oe]lenterates,
   including the Hydroidea, Discophora, and Siphonophora.

Hydrozoon \Hy`dro*zo"["o]n\, n.; pl. L. {Hydrozoa}, E.
   {Hydrozo["o]ns}. [NL.] (Zo["o]l.)
   One of the Hydrozoa.

資料來源 : WordNet®

Hydrozoa
     n : coelenterates typically having alternation of generations;
         hydroid phase is usually colonial giving rise to the
         medusoid phase by budding: hydras and jellyfishes [syn: {class
         Hydrozoa}]