One of the cells into which the egg divides after its fertilization. SYN: cleavage cell, embryonic cell. [blasto- + G. meros, part]
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blas·to·mere 'blas-tə-.mi(ə)r n a cell produced during cleavage of a fertilized egg called also cleavage cell
blas·to·mer·ic .blas-tə-'mi(ə)r-ik, -'mer- adj
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n.
any of the cells produced by cleavage of the zygote, comprising the earliest stages of embryonic development until the formation of the blastocyst. Blastomeres divide repeatedly without growth and so decrease in size.
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blas·to·mere (blasґto-mēr) [blasto- + -mere] one of the cells produced by cleavage of a zygote; called also cleavage cell.Medical dictionary. 2011.