acoelous

/eɪˈsiːləs/
adjective
  1. Lacking a true body cavity; having no coelom.
    • In the diagram, the acoelous animal is shown without any internal cavity.
    • Acoelous organisms are often studied in basic biology courses.
    • The acoelous flatworm has a very simple body structure.
Synonyms
What does "acoelous" mean? | whatsthatwordmean | whatsthatwordmean