acoelomate

/eɪˈsiːləˌmeɪt/
adjective
  1. Having no body cavity (coelom); relating to animals without a coelom.
    • The acoelomate structure of the flatworm makes it very flat.
    • The scientist described the organism as acoelomate in her report.
    • Acoelomate animals are often studied to understand early evolution.
noun
  1. An animal that does not have a body cavity (coelom) between its digestive tract and outer body wall.
    • Flatworms are a well-known example of an acoelomate.
    • The acoelomate body plan is simpler than that of most other animals.
    • In biology class, we learned that an acoelomate lacks a fluid-filled cavity.
Antonyms
What does "acoelomate" mean? | whatsthatwordmean | whatsthatwordmean