hydrozoans
n.; n. pl. [Gr. hydor, water; zoon, animal]
Class of the phylum Cnidaria having both polyp and medusal stages.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • hydrozoans — adj. belonging to the class Hydrozoa (Zoology) n. member of the class Hydrozoa (Zoology) …   English contemporary dictionary

  • Hydrozoa — Taxobox name = Hydrozoa image width = 240px image caption = Closeup of a hydrozoan colony regnum = Animalia subregnum = Eumetazoa phylum = Cnidaria subphylum = Medusozoa classis = Hydrozoa classis authority = Owen, 1843 subdivision ranks =… …   Wikipedia

  • cnidarian — /nuy dair ee euhn/, n. 1. any invertebrate animal, as a hydra, jellyfish, sea anemone, or coral, considered as belonging to the phylum Cnidaria, characterized by the specialized stinging structures in the tentacles surrounding the mouth; a… …   Universalium

  • Cnidaria — Temporal range: 580–0 Ma …   Wikipedia

  • Medusa (biology) — In biology, a medusa (plural: medusae) is a form of cnidarian in which the body is shaped like an umbrella, in contrast with polyps. Medusae vary from bell shaped to the shape of a thin disk, scarcely convex above and only slightly concave below …   Wikipedia

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  • siphonophore — noun Etymology: ultimately from Greek siphōn + pherein to carry more at bear Date: circa 1842 any of an order (Siphonophora) of compound free swimming or floating pelagic hydrozoans that are mostly delicate, transparent, and colored and have… …   New Collegiate Dictionary

  • Hirohito — / Emperor Shōwa 裕仁 / 昭和天皇 Emperor of Japan Reign 25 December 1926 – 7 January 1989 ( 1000000000000006200000062 years, 10000000000 …   Wikipedia

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