periblast

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“
A first cleavage of the stem-cell (cytula), B division of same into four segmentation-cells (only two visible), C the germinal disk divides into the blastoderm (b) and the periblast (p). d nutritive yelk, f fat-globule, c ovolemma, z space between the ovolemma and the ovum, filled with a clear fluid.)

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Definitions (2)

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  1. Cell-substance of an ovum surrounding the nucleus.

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Examples (1)

  • A first cleavage of the stem-cell (cytula), B division of same into four segmentation-cells (only two visible), C the germinal disk divides into the blastoderm (b) and the periblast (p). d nutritive yelk, f fat-globule, c ovolemma, z space between the ovolemma and the ovum, filled with a clear fluid.) —  The Evolution of Man — Volume 1
 

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Etymologies (1)

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  1. from Greek περί, around, + βλαστός, a germ.
 

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