from the GNU version of the Collaborative International Dictionary of English
- n. The primitive perivisceral cavity.
from The Century Dictionary and Cyclopedia
- n. The primitive perivisceral cavity persisting as a modified blastocœle after a blastosphere has undergone gastrulation; the blastocœle of a gasturla, or the space between the endoderm and the ectoderm, as distinguished from the cavity of the archenteron inclosed within the endoderm.
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