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8 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 hydrozoa
 水螅蟲類

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 Hy·dro·zoa /ˌhaɪdrəˈzoə/ 名詞 複數

From: Webster's Revised Unabridged Dictionary (1913)

 An·i·mal, a.
 1. Of or relating to animals; as, animal functions.
 2. Pertaining to the merely sentient part of a creature, as distinguished from the intellectual, rational, or spiritual part; as, the animal passions or appetites.
 3. Consisting of the flesh of animals; as, animal food.
 Animal magnetism. See Magnetism and Mesmerism.
 Animal electricity, the electricity developed in some animals, as the electric eel, torpedo, etc.
 Animal flower Zool., a name given to certain marine animals resembling a flower, as any species of actinia or sea anemone, and other Anthozoa, hydroids, starfishes, etc.
 Animal heat Physiol., the heat generated in the body of a living animal, by means of which the animal is kept at nearly a uniform temperature.
 Animal spirits. See under Spirit.
 Animal kingdom, the whole class of beings endowed with animal life. It embraces several subkingdoms, and under these there are Classes, Orders, Families, Genera, Species, and sometimes intermediate groupings, all in regular subordination, but variously arranged by different writers.
 Note: The following are the grand divisions, or subkingdoms, and the principal classes under them, generally recognized at the present time: --
 Vertebrata, including Mammalia or Mammals, Aves or Birds, Reptilia, Amphibia, Pisces or Fishes, Marsipobranchiata (Craniota); and Leptocardia (Acrania).
 Tunicata, including the Thaliacea, and Ascidioidea or Ascidians.
 Articulata or Annulosa, including Insecta, Myriapoda, Malacapoda, Arachnida, Pycnogonida, Merostomata, Crustacea (Arthropoda); and Annelida, Gehyrea (Anarthropoda).
 Helminthes or Vermes, including Rotifera, Chætognatha, Nematoidea, Acanthocephala, Nemertina, Turbellaria, Trematoda, Cestoidea, Mesozea.
 Molluscoidea, including Brachiopoda and Bryozoa.
 Mollusca, including Cephalopoda, Gastropoda, Pteropoda, Scaphopoda, Lamellibranchiata or Acephala.
 Echinodermata, including Holothurioidea, Echinoidea, Asterioidea, Ophiuroidea, and Crinoidea.
 Cœlenterata, 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.
 

From: Webster's Revised Unabridged Dictionary (1913)

 Hy·dro·zo·a n. pl.  Zool. The Acalephæ; one of the classes of cœlenterates, including the Hydroidea, Discophora, and Siphonophora.
 

From: Webster's Revised Unabridged Dictionary (1913)

 Hy·dro·zo·ön n.; pl. L. Hydrozoa E. Hydrozoöns   Zool. One of the Hydrozoa.
 

From: WordNet (r) 2.0

 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

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

From: WordNet (r) 2.0

 hydrozoa
      See hydrozoan