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nucleus
noun
nu·cle·us ˈnü-klē-əs 
ˈnyü-
plural nuclei ˈnü-klē-ˌī
ˈnyü-
also nucleuses 1
a
: the small bright body in the head of a comet
b
: the small brighter and denser portion of a galaxy (see galaxy sense 1b)
2
: a central point, group, or mass about which gathering, concentration, or accretion takes place: such as
a
: a cellular organelle of eukaryotes that is essential to cell functions (such as reproduction and protein synthesis), is composed of nucleoplasm and a nucleoprotein-rich network from which chromosomes and nucleoli arise, and is enclosed in a definite membrane see cell illustration
b
: a mass of gray matter or group of cell bodies of neurons in the central nervous system
c
: a characteristic and stable complex of atoms or groups in a molecule (see molecule sense 1)
d
: the positively charged central portion of an atom that comprises nearly all of the atomic mass and that consists of protons and usually neutrons
Synonyms
Example Sentences
a college campus that was a nucleus of opposition to the war the nucleus of the movement's methodology has always been passive resistance
Recent Examples on the Web Pale reeds swoop around the perimeter like electrons orbiting an atom’s nucleus. 
Cate Mcquaid, BostonGlobe.com, 30 Aug. 2022 Their plan is to insert the cell’s nucleus into a fat-tailed dunnart’s egg, then stimulate embryonic growth. Sarah Kuta, Smithsonian Magazine, 19 Aug. 2022 The nucleus accumbens, according to the latest research, is associated with processing reinforcement, motivation, and desire. Zachary Siegel, Harper’s Magazine , 17 Aug. 2022 The way genes are organized within the nucleus, anything that damages that has the potential to drive a cell into this senescent state. Steven Strogatz, Quanta Magazine, 27 July 2022 Ayton, Bridges and Johnson are three fourths of the Suns' building nucleus along with Booker, who has agreed to a four-year, $224-million supermax deal. Duane Rankin, The Arizona Republic, 6 July 2022 This leads to an embryo with the nucleus from two parents but mitochondria from a third person, which can then be used in IVF to start a pregnancy. Walter G. Johnson And Diana M. Bowman, STAT, 24 Apr. 2022 That nucleus then shoots out a few more neutrons that go on to split more nuclei. Katie Hafner, Scientific American, 21 Apr. 2022 In healthy cells, DNA is enclosed within the nucleus. William A. Haseltine, Forbes, 21 Apr. 2022 See More
Cate Mcquaid, BostonGlobe.com, 30 Aug. 2022 Their plan is to insert the cell’s nucleus into a fat-tailed dunnart’s egg, then stimulate embryonic growth. Sarah Kuta, Smithsonian Magazine, 19 Aug. 2022 The nucleus accumbens, according to the latest research, is associated with processing reinforcement, motivation, and desire. Zachary Siegel, Harper’s Magazine , 17 Aug. 2022 The way genes are organized within the nucleus, anything that damages that has the potential to drive a cell into this senescent state. Steven Strogatz, Quanta Magazine, 27 July 2022 Ayton, Bridges and Johnson are three fourths of the Suns' building nucleus along with Booker, who has agreed to a four-year, $224-million supermax deal. Duane Rankin, The Arizona Republic, 6 July 2022 This leads to an embryo with the nucleus from two parents but mitochondria from a third person, which can then be used in IVF to start a pregnancy. Walter G. Johnson And Diana M. Bowman, STAT, 24 Apr. 2022 That nucleus then shoots out a few more neutrons that go on to split more nuclei. Katie Hafner, Scientific American, 21 Apr. 2022 In healthy cells, DNA is enclosed within the nucleus. William A. Haseltine, Forbes, 21 Apr. 2022 See More Word History
Phrases Containing nucleus
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