noun Embryology.
the cavity of a blastula, arising in the course of cleavage.
Also, blastocoele.
Also called segmentation cavity.

1875–80; blasto- + -coel

blastocoelic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
blastocoel or blastocoele (ˈblæstəʊˌsiːl)
embryol Also called: segmentation cavity the cavity within a blastula
blastocoele or blastocoele

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

blastocoel blas·to·coel or blas·to·cele or blas·to·coele (blās'tə-sēl')
The fluid-filled cavity in the blastula of a developing embryo. Also called cleavage cavity, segmentation cavity.

blas'to·coe'lic adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
blastocoel or blastocoele   (blās'tə-sēl')  Pronunciation Key 
The fluid-filled, central cavity of a blastula.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The archenteron extends across the blastocoel until its tip touches and attaches to the opposite side of the blastocoel.
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