acoelomate

[ey-see-luh-meyt, ey-see-loh-mit]

adjective

1. Also acoelomatous acoelomous. having no coelum.

noun

1. any organism that lacks a cavity between the body wall and the digestive tract, including the flatworms, nemertines, and sea anemones.

Word History and Origins

Origin of acoelomate¹

First recorded in 1875–80; a- ⁶ + coelomate