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reduction division

American  

noun

Biology.
  1. the first division of meiosis in which the number of chromosomes is reduced to half the original number.

  2. meiosis.


reduction division British  

noun

  1. another name for meiosis

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of reduction division

First recorded in 1890–95

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

“On Skid Row, it’s a day-to-day crisis. It’s visible,” said Shoshanna Scholar, director of the harm reduction division at the Los Angeles County Health Department.

From Los Angeles Times May 31, 2023

For this reason, meiosis I is referred to as a reduction division.

From Textbooks Jun. 9, 2022

Figures 184 a and 185 show that the unequal components of the unsymmetrical pair, as well as the equal components of the symmetrical pairs, are separated in metakinesis, making this clearly a reduction division.

From Studies in Spermatogenesis Part I by Stevens, Nettie Maria

The ovum then with one X chromosome or one X and one Y changes its sex at the next reduction division and becomes male.

From Hormones and Heredity by Cunningham, J. T.

This is certainly a reduction division, for the tetrads are always somewhat elongated and come into the spindle with their longer axes parallel with the axis of the spindle.

From Studies in Spermatogenesis Part I by Stevens, Nettie Maria

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