epicoele

noun3

1. •
   A perivisceral cavity made by an invagination of an ectoderm.

   • In the cerebellum the thickening takes place to such an extent that the epicoele is usually obliterated altogether. — 1921
2. •
   A cavity formed by the invagination of the outer wall of the body, as the atrium of an amphioxus and possibly the body cavity of vertebrates.
3. •
   epicoelia