Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of numerous coelenterates of the class Hydrozoa, including the freshwater hydras, hydroids, hydrocorals, and siphonophores.
  • adj. Of, relating to, or belonging to the class Hydrozoa.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of many colonial coelenterates, of the class Hydrozoa, including the hydras, hydroids, hydrocorals, and siphonophores.

from The Century Dictionary and Cyclopedia

  • Pertaining to the Hydrozoa; resembling the Hydrozoa, or having their characters.
  • n. One of the Hydrozoa, as an acaleph, medusan, or jelly-fish.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. colonial coelenterates having the polyp phase dominant

Etymologies

From New Latin Hydrozōa, class name : hydro- + -zōa, pl. of -zōon, -zoon.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

  • Turritopsis Nutricula is technically known as a hydrozoan and is the only known animal that is capable of reverting completely to its younger self.

    Malnurtured Snay

  • Turritopsis is technically known as a 'hydrozoan' and is the only animal that is capable of reverting completely to its younger self.

    Blah, Blah! Technology

  • Turritopsis nutricula, a hydrozoan, may be as close as it gets to an "immortal" creature, reverting back to its juvenile polyp stage after mating.

    Archive 2009-01-01

  • Scientists say the hydrozoan jellyfish is the only known animal that can repeatedly turn back the hands of time and revert to its polyp state its first stage of life.

    Archive 2010-03-14

  • The hydrozoan Turritopsis nutricula has evolved a remarkable variation on this theme, and in so doing appears to have achieved immortality.

    January « 2008 « Gerry Canavan

  • "Fire coral", actually a hydrozoan, causes skin irritation, corals are sharp and can cause cuts.

    Chapter 8

  • This tiny hydrozoan can reverse the aging process, transforming from its mature form into its immature form, and back again.

    Matador Network

  • The hydrozoan cnidarian, Hydra magnipapillata, has retained four of the six Lhx subfamilies, but apparently lost two others.

    BioMed Central - Latest articles

  • Pennaria Hydrozoa - Many hydrozoan species exist in colonies that are formed by the asexual budding of members.

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  • In some cases, gene relationships among cnidarian groups are congruent with the species phylogeny: hydrozoan sequences are sister-group to scyphozoan sequences, with anthozoan sequences branching basally to this ensemble.

    PLoS ONE Alerts: New Articles

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