Search Result for "hydrozoa": 
Wordnet 3.0

NOUN (1)

1. 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]


The Collaborative International Dictionary of English v.0.48:

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]
The Collaborative International Dictionary of English v.0.48:

Hydrozoon \Hy`dro*zo"["o]n\, n.; pl. L. Hydrozoa, E. Hydrozo["o]ns. [NL.] (Zool.) One of the Hydrozoa. [1913 Webster]
The Collaborative International Dictionary of English v.0.48:

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
WordNet (r) 3.0 (2006):

Hydrozoa n 1: 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]