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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