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blastocyst
blas·to·cyst [ blástə sìst ] (plural blas·to·cysts)


noun 
Definition:
 
embryonic stage: a mammalian embryo at the stage when it is implanted in the wall of the womb

blas·to·cys·tic [ blàstə sístik ] adjective
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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