vegetal pole

noun

, Embryology.

1. the relatively inactive part of an ovum opposite the animal pole, containing much yolk and little cytoplasm.

Word History and Origins

Origin of vegetal pole¹

First recorded in 1895–1900

Example Sentences

At the lower or vegetal pole of the ovum a crown of eight large entodermic cells remains for a long time unchanged, while the other cells divide, owing to the formation of a series of horizontal circles, into an increasing number of crowns of sixteen cells each.

From Project Gutenberg

The folded crest-shaped entoderm grows with a free circular border on the inner surface of the entoderm towards the vegetal pole; when it has reached this, and the inner surface of the blastula is completely grown over, the primitive gut is closed.

From Project Gutenberg

The vegetal pole of the vertical axis is just in the centre of the primitive mouth.

From Project Gutenberg

It has arisen through the accumulation of a store of food-stuff at the vegetal pole, a "nutritive yelk" being thus formed in contrast to the "formative yelk."

From Project Gutenberg

The primitive mouth, which at first, in the typical archigastrula, lay at the vegetal pole of the main axis, is forced away to the dorsal side; and whereas its two lips lay at first in a plane at right angles to the chief axis, they are now so far thrust aside that their plane cuts the axis at a sharp angle.

From Project Gutenberg