a•coe•lo•mate(ā sē′lə māt′, ā′sē lō′mit),USA pronunciation[Zool.] adj.Also, a•coe•lom•a•tous(ā′sē lom′ə təs, -lō′mə-),USA pronunciationa•coe′lo•mous. having no coelum. n.
Invertebrates, Zoologyany organism that lacks a cavity between the body wall and the digestive tract, including the flatworms, nemertines, and sea anemones.