nucleus

noun

/ˈnjuːkliəs/

/ˈnuːkliəs/

(plural nuclei

/ˈnjuːkliaɪ/

/ˈnuːkliaɪ/

)

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(physics物理) the part of an atom that contains most of its mass and that carries a positive electric charge核；原子核 see also neutron, proton
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Topics Physics and chemistryc1
(biology生物) the central part of some cells, containing the genetic material细胞核Topics Biologyc1
the central part of something around which other parts are located or collected核心；中心
- These paintings will form the nucleus of a new collection.这些画将构成新的收藏系列的基础。

Word Originearly 18th cent.: from Latin, literally ‘kernel, inner part’, diminutive of nux, nuc- ‘nut’.