Definitions

from The Century Dictionary.

  • Ciliated embryos of the polychætous annelids, in which the cilia form a broad zone around the body, leaving each end free of cilia, excepting, in some cases, a tuft on the head. See mesotrocha, telotrocha.
  • In Rotifera, a group of wheel-animalcules having no cilia and the lobes highly modified in shape; the wheelless rotifers.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Zoöl.) A kind of chætopod larva in which no circles of cilia are developed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun zoology A kind of chaetopod larva in which no circles of cilia are developed.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek a- privative + a circle.

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Examples

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