Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An animal that lacks a coelom. Acoelomates, which include flatworms and tapeworms, exhibit bilateral symmetry and have no body cavity between the gut and the epidermis.

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

  • noun zoology Any animal without a coelom.
  • adjective zoology Having no coelom.

Etymologies

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

[New Latin Acoelōmata, group name : a– + Greek koilōma, koilōmat-, cavity; see coelom.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

a- +‎ coelomate

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