Epicœle

[f. EPI- + Gr. κοιλ-ἰα the cavity of the belly.] (See quot. and ATRIUM.)

  Hence Epicœlous a., having an epicœle.

1877.  Huxley, Anat. Inv. Anim., xi. 636. Again, in the Tunicata, as we have seen, the atrium is a kind of ‘perivisceral cavity,’ which is formed either by an invagination of the ectoderm, in which case it may be termed an epicœle; or [etc.].