Definition of Reduction division

1. Noun. (genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants).

Exact synonyms: Meiosis, Miosis
Category relationships: Genetic Science, Genetics
Terms within: Anaphase, Cytokinesis, Karyokinesis, Metaphase, Prophase, Segregation, Telophase
Generic synonyms: Cell Division, Cellular Division
Specialized synonyms: Nondisjunction
Derivative terms: Meiotic

Definition of Reduction division

1. Noun. (biology genetics cytology) the first of the two divisions of meiosis, a type of cell division. ¹

2. Noun. (biology genetics cytology) meiosis as a whole, a type of cell division. ¹

¹ Source:

Medical Definition of Reduction division

1. The first cell division in meiosis, the process by which germ cells are formed. A unique event in which the chromosome number is reduced from diploid (46 chromosomes) to haploid (23 chromosomes). Also called first meiotic division or first meiosis. (12 Dec 1998)

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Lexicographical Neighbors of Reduction Division

reductic acid
reductio ad Hitlerum
reductio ad absurdum
reduction division (current term)
reduction gear
reduction in force
reduction mammaplasty
reduction nucleus
reduction potential
reduction to the absurd

Literary usage of Reduction division

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

1. Strasburger's Text-book of Botany by Eduard Strasburger, Hans Fitting, William Henry Lang (1921)
"The formation of the daughter nuclei is completed (10) as in an ordinary division, but following promptly on the first reduction division, which is also ..."

2. Journal of Applied Microscopy by Bausch & Lomb Optical Company (1900)
"In introducing the subject of the reduction division, the statement is made that the existence or non-existence of a reducing division has not yet been ..."

3. Heredity and Environment in the Development of Men by Edwin Grant Conklin (1916)
"32 E), but it is possible that some chromosome pairs undergo an equation division in the first maturation mitosis and a reduction division in the second, ..."

4. Proceedings of the American Philosophical Society Held at Philadelphia for by American Philosophical Society (1904)
"... a maternal and paternal chromosome of corresponding volume, separate from each other in the reduction division, chromosomes of like hereditary quality ..."

5. The Laws of Heredity by George Archdall O'Brien Reid (1910)
"So much has been made of the reduction division that it is necessary to consider it. ... This is the ' reduction ' division. A second division in which the ..."

6. Plant Genetics by John Merle Coulter, Merle Crowe Coulter (1918)
"In heterosporous forms therefore the gametophytes are always dioecious, but it cannot be said that the sexes are separated at the reduction division. ..."

7. The New International Encyclopædia edited by Daniel Coit Gilman, Harry Thurston Peck, Frank Moore Colby (1903)
"reduction division AND ... The division by which the polar bodies is produced is known as reduction division. The first polar body may divide at the time ..."

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