🔍 牛津詞典
🔍 朗文詞典
🔍 劍橋詞典
🔍 柯林斯詞典
🔍 麥美倫詞典
🔍 韋氏詞典 🎯

檢索以下詞典:
(Mr. Ng 不推薦使用 Google 翻譯!)
最近搜尋:
TOEFL IELTS BNC: 5854 COCA: 6944

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
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

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

Time Traveler
The first known use of nucleus was in 1668

👨🏻‍🏫 Mr. Ng 韋氏詞典 📚 – mw.mister5️⃣.net
切換為繁體中文
Site Uptime