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

  • n. A feeding zooid in a hydroid colony having an oral opening surrounded by tentacles.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An individual polyp of a hydroid colony

from the GNU version of the Collaborative International Dictionary of English

  • n. One of the nutritive zooids of a hydroid colony. Also applied to the proboscis or manubrium of a hydroid medusa. See Illust. of hydroidea.

from The Century Dictionary and Cyclopedia

  • n. A polypite; the fundamental structural element in Hydrozoa.


hydr(a) + Greek anthos, flower.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From hydra +‎ -anth, thus "hydra blossom". (Wiktionary)


  • Campanularia) the tentacles may be completely absorbed into the body of the hydranth from which they originally sprang.

    The Scientific Monthly, October-December 1915

  • An 'wasn't it thim same polace crathurs, too, I'm askin' ye, as took our rainwather cistern away along of the fevers breakin 'out, they made bold to say, the desaivin' crathers, -- an 'me a-niver havin' me washin 'white a-since, for ye'll aisy see why, usin' the muddy wather as comes from that hydranth yirselves! "

    The Angel of the Tenement


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