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germinal disk

American  

noun

Embryology.
  1. blastodisk.


Etymology

Origin of germinal disk

First recorded in 1875–80

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The first change in the round germinal disk of the chick is that the cells at its edges multiply more briskly, and form darker nuclei in their protoplasm.

From The Evolution of Man — Volume 1 by Haeckel, Ernst Heinrich Philipp August

Germinal area or germinal disk of the rabbit, with sole-shaped embryonic shield, magnified about ten times.

From The Evolution of Man — Volume 1 by Haeckel, Ernst Heinrich Philipp August

First is formed a lens-shaped circular germinal disk.

From The Evolution of Man — Volume 1 by Haeckel, Ernst Heinrich Philipp August

Segmentation is, as in other richly yolked eggs, incomplete, confined to the germinal disk at the opercular pole.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" by Various

There is a brisk multiplication of these at the edge of the germinal disk, especially in the neighbourhood of the sickle-shaped primitive mouth.

From The Evolution of Man — Volume 1 by Haeckel, Ernst Heinrich Philipp August

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