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nuclei

American  
[noo-klee-ahy, nyoo-] / ˈnu kliˌaɪ, ˈnju- /

noun

  1. plural of nucleus.


nuclei British  
/ ˈnjuːklɪˌaɪ /

noun

  1. a plural of nucleus

"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 nuclei

< Latin nucleī, nominative plural of nucleus; see 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:

Small cellular structures, including mitochondria and nuclei, scatter very little light and therefore appear only slightly darker than the surrounding material.

From Science Daily ● Oct. 22, 2026

Known as active galactic nuclei, these bright and powerful galactic cores can launch jets of particles and enormous outbursts that influence conditions across their host galaxies.

From Science Daily ● Oct. 20, 2026

By using atomic nuclei as exceptionally stable references, nuclear clocks could eventually allow scientists to measure time and other physical quantities with levels of accuracy that existing technologies cannot reach.

From Science Daily ● Oct. 11, 2026

Atomic nuclei are more than 10,000 times smaller than atoms.

From Science Daily ● Oct. 11, 2026

The DNA of mitochondria is qualitatively different from the DNA of animal cell nuclei and strikingly similar to bacterial DNA; moreover, like microbial DNA, it is closely associated with membranes.

From "The Lives of a Cell" by Lewis Thomas

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