Hydrozoa

6 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hydrozoa \Hy`dro*zo"a\, n. pl. [NL., fr. E. hydra + Gr. zo^,on
     an animal.] (Zool.)
     The Acaleph[ae]; one of the classes of c[oe]lenterates,
     including the Hydroidea, Discophora, and Siphonophora.
     [1913 Webster]



From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hydrozoon \Hy`dro*zo"["o]n\, n.; pl. L. {Hydrozoa}, E.
     {Hydrozo["o]ns}. [NL.] (Zool.)
     One of the Hydrozoa.
     [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  {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.
  {Protozoa}, including {Infusoria} and {Rhizopoda}. For
  definitions, see these names in the Vocabulary.
  [1913 Webster] Animalcular

From WordNet (r) 2.0 [wn]:

  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}]

From WordNet (r) 2.0 [wn]:

  hydrozoan
       n : colonial coelenterates having the polyp phase dominant [syn:
            {hydroid}]
       [also: {hydrozoa} (pl)]

From WordNet (r) 2.0 [wn]:

  hydrozoa
       See {hydrozoan}