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.

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reduction division British  

noun

1. another name for meiosis

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Etymology

Origin of reduction division

First recorded in 1890–95

Example Sentences

“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

The chromosomes before the reduction division are arranged in pairs, each pair consisting, it is believed, of one paternal and one maternal chromosome.

From Hormones and Heredity by Cunningham, J. T.

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.

The first stage in the division of the nucleus in the gonotokonts has therefore been termed the reduction division.

From Darwin and Modern Science by Seward, A. C. (Albert Charles)