nucleus

noun

nu·cle·us ˈnü-klē-əs How to pronounce nucleus (audio)

ˈnyü-

plural nuclei ˈnü-klē-ˌī How to pronounce nucleus (audio)

ˈnyü-

also nucleuses

: the small bright body in the head of a comet

: the small brighter and denser portion of a galaxy (see galaxy sense 1b)

: a central point, group, or mass about which gathering, concentration, or accretion takes place: such as

: 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

: a mass of gray matter or group of cell bodies of neurons in the central nervous system

: a characteristic and stable complex of atoms or groups in a molecule (see molecule sense 1)

especially : ring

the naphthalene nucleus

: the positively charged central portion of an atom that comprises nearly all of the atomic mass and that consists of protons and usually neutrons

: the peak of sonority in the utterance of a syllable

: a basic or essential part : core

players who are the nucleus of the team

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

Kids Definition

nucleus

noun

nu·cle·us ˈnü-klē-əs How to pronounce nucleus (audio)

ˈnyü-

plural nuclei

-klē-ˌī

: a usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes

: the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons

: a central point, group, or mass

Those players are the nucleus of the team.

Medical Definition

nucleus

noun

nu·cle·us ˈn(y)ü-klē-əs How to pronounce nucleus (audio)

plural nuclei -klē-ˌī How to pronounce nucleus (audio)

also nucleuses

: a cellular organelle of eukaryotes that is essential to cell functions (as reproduction and protein synthesis), is composed of nuclear sap and a nucleoprotein-rich network from which chromosomes and nucleoli arise, and is enclosed in a definite membrane

: a mass of gray matter or group of nerve cells in the central nervous system

: a characteristic and stable complex of atoms or groups in a molecule

especially : ring sense 2

the naphthalene nucleus

: the positively charged central portion of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons except in hydrogen which consists of one proton only

单词	nucleus
释义	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) especially : ring the naphthalene nucleus 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 3 : the peak of sonority in the utterance of a syllable 4 : a basic or essential part : core players who are the nucleus of the team Synonyms axis base capital center central core cynosure epicenter eye focus ground zero heart hub locus mecca navel nerve center nexus omphalos seat See all Synonyms & Antonyms 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 Word History Etymology New Latin, from Latin, kernel, from nuc-, nux nut — more at nut First Known Use 1668, in the meaning defined at sense 1a Phrases Containing nucleus generative nucleus polar nucleus suprachiasmatic nucleus tube nucleus sperm nucleus endosperm nucleus caudate nucleus generative nucleus polar nucleus suprachiasmatic nucleus tube nucleus sperm nucleus endosperm nucleus caudate nucleus See More Kids Definition nucleus noun nu·cle·us ˈnü-klē-əs ˈnyü- plural nuclei -klē-ˌī 1 : a usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons 3 : a central point, group, or mass Those players are the nucleus of the team. Medical Definition nucleus noun nu·cle·us ˈn(y)ü-klē-əs plural nuclei -klē-ˌī also nucleuses 1 : a cellular organelle of eukaryotes that is essential to cell functions (as reproduction and protein synthesis), is composed of nuclear sap and a nucleoprotein-rich network from which chromosomes and nucleoli arise, and is enclosed in a definite membrane 2 : a mass of gray matter or group of nerve cells in the central nervous system 3 : a characteristic and stable complex of atoms or groups in a molecule especially : ring sense 2 the naphthalene nucleus 4 : the positively charged central portion of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons except in hydrogen which consists of one proton only nucleus noun 1 as in center a thing or place that is of greatest importance to an activity or interest a college campus that was a nucleus of opposition to the war Synonyms & Similar Words Relevance center hub capital core mecca base locus central heart focus axis seat nexus epicenter nerve center ground zero headquarters navel cynosure playground omphalos eye where it's at hive magnet hotbed essence kernel attraction hot spot soul thick pith polestar quintessence playland nub deep loadstone lodestone happy hunting ground 2 as in core the central part or aspect of something under consideration the nucleus of the movement's methodology has always been passive resistance Synonyms & Similar Words core heart essence root kernel sum point meat net bottom line pivot centerpiece pith crux nub sum and substance subject nubbin gist direction substance theme keynote tenor bull's-eye body content meat and potatoes drift the long and short course the long and the short hypothesis proposition thesis purport
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nucleus

noun

Synonyms

Example Sentences

Word History

Phrases Containing nucleus

Kids Definition

noun

Medical Definition

noun

noun