单词 | nucleus |
释义 | nucleusnoun 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 nucleus noun1 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
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
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