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

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

They are nucleated cells, the nucleus going by the special name of the germinal vesicle and the nucleolus the germinal spot.

From Text Book of Biology, Part 1: Vertebrata by Wells, H. G. (Herbert George)

These began in 1875 and following years with a careful examination of the behaviour of the germinal vesicle in the maturation and fertilization of the ovum.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various

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

In case of horns of cattle, which when inherited must depend on germinal vesicle, obviously no effect till cattle full-grown.

From The Foundations of the Origin of Species Two Essays written in 1842 and 1844 by Darwin, Francis, Sir