Hypertext Webster Gateway: "Hydrozoa"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
{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.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Hydrozoon \Hy`dro*zo"["o]n\, n.; pl. L. {Hydrozoa}, E.
{Hydrozo["o]ns}. [NL.] (Zo["o]l.)
One of the Hydrozoa.
From WordNet (r) 1.7 (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: {Hydrozoa},
{class Hydrozoa}]
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