The Collaborative International Dictionary
segmentation cavity
blastocoel \blastocoel\, Blastocoele \Blas"to*c[oe]le\ blastocoele \blastocoele\, n. [Gr. blasto`s sprout + koi^los hollow.] (Biol.) The cavity inside a blastula; -- also called segmentation cavity.
WordNet
segmentation cavity
n. the fluid-filled cavity inside a blastula [syn: blastocoel, blastocoele, blastocele, cleavage cavity]