Definition of acoelous in English:

acoelous

Pronunciation /eɪˈsiːləs/

adjective

(also acelous)
Zoology
  • Lacking an intestinal cavity; specifically of or relating to the group Acoela of simple flatworms having no distinct gut.

    In some glossaries confused with
    acoelomate
    .

Origin

Late 19th century; earliest use found in Francis Pascoe (1813–1893), entomologist. From scientific Latin Acoela + -ous.