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Showing results for micronucleus. Search instead for micronucleuses.

micronucleus

American  
[mahy-kroh-noo-klee-uhs, -nyoo-] / ˌmaɪ kroʊˈnu kli əs, -ˈnju- /

noun

Biology.
  • micronuclei
    plural
  1. the smaller of the two types of nuclei occurring in ciliate protozoans.


micronucleus British  
/ ˌmaɪkrəʊˈnjuːklɪəs /

noun

  1. the smaller of two nuclei in ciliated protozoans, involved in reproduction Compare macronucleus

"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

Other Word Forms

Derived Forms

Inflected Forms

Nouns


Etymology

Origin of micronucleus

First recorded in 1890–95; micro- + nucleus


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:

If the algorithm detects a cell with a micronucleus, it sends the location to the microscope.

From Science Daily ● Mar. 10, 2026

When a micronucleus ruptures, the chromosome inside is left exposed.

From Science Daily ● Feb. 16, 2026

The diploid micronucleus in each cell then undergoes meiosis to produce four haploid micronuclei.

From Textbooks ● Jan. 1, 2015

Inside are food vacuoles, a large macronucleus, and a small micronucleus.

From Textbooks ● Jan. 1, 2015

The contractile vacuole is central and dorsal; the macronucleus is in the anterior half of the body, with one attached micronucleus.

From Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 by Gary N. (Gary Nathan) Calkins

Cells that contain micronuclei are more likely to develop additional chromosomal abnormalities, increasing their chances of becoming cancerous.

From Science Daily ● Mar. 10, 2026

Chromothripsis begins when errors during cell division trap individual chromosomes inside small, fragile compartments known as micronuclei.

From Science Daily ● Feb. 16, 2026

The most dramatic increases in genomic instability were seen when the researchers knocked out the gene DSCC1, increasing abnormal micronuclei formation five-fold.

From Science Daily ● Feb. 14, 2024

The parent cells swap one of these micronuclei.

From Textbooks ● Jan. 1, 2015

The macronucleus is globular and central, occasionally band-form and with numerous attached micronuclei.

From Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 by Gary N. (Gary Nathan) Calkins

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