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

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

In the thick fine-grained yelk we find a clear round germinal vesicle of about 1/750 of an inch in diameter, and this encloses a small embryonic spot or nucleolus.

From The Evolution of Man — Volume 2 by Haeckel, Ernst Heinrich Philipp August

Wagner in his Prodromus called attention to the widespread occurrence, within the germinal vesicle of a darker speck which he called the Keimfleck or germinal spot, known sometimes as Wagner's spot.

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 germinal vesicle is so simple, that a line will contain all that can be said of it.

From Evolution, Old & New Or, the Theories of Buffon, Dr. Erasmus Darwin and Lamarck, as compared with that of Charles Darwin by Butler, Samuel