Lexic.us

Definition of Polar body

1. Noun. A small cell containing little cytoplasm that is produced along with the oocyte and later discarded.

Definition of Polar body

1. Noun. (biology) One of the small cells that are by-products of the meiosis that forms an egg. ¹

¹ Source: wiktionary.com

Medical Definition of Polar body

1. In animals each meiotic division of the oocyte leads to the formation of one large cell (the egg) and a small polar body as the other cell. Polar body formation is a consequence of the very eccentric position of the nucleus and the spindle. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Polar Body

Literary usage of Polar body

Below you will find example usage of this term as found in modern and/or classical literature:

1. Biological Bulletin by Marine Biological Laboratory (Woods Hole, Mass.) (1914)
"In such cases it is possible that the polar body has already degenerated and been absorbed, or as Kirkham suggests for normal ..."

2. Handbook of Physiology by William Dobinson Halliburton (1913)
"without any Testing-stage, results in the formation of the mature ovum and the second polar body. Thus, when the two divisions are completed, ..."

3. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General by Thomas Spencer Baynes (1888)
"The upper portion of this is segmented off (surrounded by very little of the protoplasm of the ovum) as a polar body, while the lower portion of the body ..."

4. Proceedings of the American Philosophical Society Held at Philadelphia for by American Philosophical Society (1903)
"Weismann (1886) found that one polar body is given off in the case of ... Weismann was thus led to the view that the second polar body is of special ..."

5. Proceedings of the Academy of Natural Sciences of Philadelphia (1905)
"By this means the first polar body becomes removed from the surface of the egg. The ovocyte of the second order (fig. 10) shows the second polar spindle, ..."

6. An Introduction to Cytology by Lester Whyland Sharp (1921)
"In some cases the nucleus of the second polar body, with 84 chromosomes, actually docs ... In other cases only one polar body is produced, but reduction is ..."

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