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

In some forms the reduction division occurs in the secondary spermatocytes instead of the primary.

From Being Well-Born An Introduction to Eugenics by Guyer, Michael F.

This, however, appeared later as a product of the further evolution of the zygote, and the reduction division was correspondingly postponed.

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

The behaviour of the chromosomes in meiosis or reduction division both in the pollen mother-cells and in the megaspore mother-cells which give rise to the so-called embryo-sac are fully described by Gates.

From Hormones and Heredity by Cunningham, J. T.