One of the cells of the early embryo, formed during the first few divisions of the newly-fertilized zygote.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.
Blas"to*mere (?), n. [Gr. sprout + -mere.] Biol.
One of the segments first formed by the division of the ovum.
© Webster 1913.
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