germinal vesicle

American  

noun

Embryology.

1. the large, vesicular nucleus of an ovum before the polar bodies are formed.

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germinal vesicle British  

noun

1. biology the large nucleus of an oocyte before it develops into an ovum

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Etymology

Origin of germinal vesicle

First recorded in 1850–55

Example Sentences

See Examples For:

germinal vesicle

As early as 1791 Poli had seen the germinal vesicle in the eggs of molluscs, but the first adequate account was given by Purkinje.

From Form and Function A Contribution to the History of Animal Morphology by E. S. (Edward Stuart) Russell

"The ovarian eggs of all animals are identical, small cells with vitellus, germinal vesicle and germinal spot."

From Facts and Arguments for Darwin by Muller, Fritz

The subsequent behavior of the pollen cell, its division and its fertilization of the germinal vesicle or oosphere, leave no doubt as to its analogy with the microspore of vascular cryptogams.

From Scientific American Supplement, No. 531, March 6, 1886 by Various

In these the original nucleus of the ovum, the germinal vesicle, is lost.

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

Either the ovum was a cell and the germinal vesicle its nucleus, or else the germinal vesicle was itself a cell within the larger cell of the ovum and the germinal spot was its nucleus.

From Form and Function A Contribution to the History of Animal Morphology by E. S. (Edward Stuart) Russell