Found 2 items, similar to Hydrozoa.
English → English
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
English → English
, n.; pl. L. Hydrozoa
. [NL.] (Zo["o]l.)
One of the Hydrozoa.
, n. pl. [NL., fr. E. hydra + Gr. zo^,on
an animal.] (Zo["o]l.)
The Acaleph[ae]; one of the classes of c[oe]lenterates,
including the Hydroidea, Discophora, and Siphonophora.
, a. [Cf. F. animal.]
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.
. See Magnetism
, the electricity developed in some
animals, as the electric eel, torpedo, etc.
(Zo["o]l.), a name given to certain marine
animals resembling a flower, as any species of actinia or
sea anemone, and other Anthozoa, hydroids, starfishes,
(Physiol.), the heat generated in the body of a
living animal, by means of which the animal is kept at
nearly a uniform temperature.
. See under Spirit
, 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
Note: The following are the grand divisions, or subkingdoms,
and the principal classes under them, generally
recognized at the present time:
, including Mammalia or Mammals, Aves or
Birds, Reptilia, Amphibia, Pisces or Fishes,
Marsipobranchiata (Craniota); and Leptocardia
, including the Thaliacea
or Ascidians. Articulata
including Insecta, Myriapoda, Malacapoda, Arachnida,
Pycnogonida, Merostomata, Crustacea (Arthropoda); and
Annelida, Gehyrea (Anarthropoda).
, including Rotifera,
Ch[ae]tognatha, Nematoidea, Acanthocephala, Nemertina,
Turbellaria, Trematoda, Cestoidea, Mesozea.
, including Brachiopoda and Bryozoa.
, including Cephalopoda, Gastropoda,
Pteropoda, Scaphopoda, Lamellibranchiata or Acephala.
, including Holothurioidea, Echinoidea,
Asterioidea, Ophiuroidea, and Crinoidea.
, including Anthozoa
, and Hydrozoa
or Acalephs. Spongiozoa
, including the sponges.
, including Infusoria
definitions, see these names in the Vocabulary.