enterocœle

from The Century Dictionary.

• noun That kind of body-cavity or cœloma which is proper to the Actinozoa; the somatic or perivisceral cavity of an actinozoan, consisting of the intermesenteric chambers collectively, made one with the gastric or proper enteric cavity by means of a common axial chamber. See Actinozoa, and extract under etenophoran, n.
• noun A body-cavity or cœlom which arises as a diverticulum from the digestive cavity of the embryo.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Anat.) A perivisceral cavity which arises as an outgrowth or outgrowths from the digestive tract; distinguished from a schizocœle, which arises by a splitting of the mesoblast of the embryo.