nucleus

英 [ˈnjuːkliəs]

美 [ˈnuːkliəs]

n. 核; 原子核; 细胞核; 核心; 中心

复数：nuclei　

Collins.1 / BNC.5854 / COCA.6944

牛津词典

noun

核；原子核
the part of an atom that contains most of its mass and that carries a positive electric charge
细胞核
the central part of some cells, containing the genetic material
核心；中心
the central part of sth around which other parts are located or collected
1. 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。

N-COUNT (原子)核
Thenucleusof an atom or cell is the central part of it.
1. Neutrons and protons are bound together in the nucleus of an atom.
  在原子核里，中子和质子是结合在一起的。
N-COUNT (组织的)核心，中心
The nucleus ofa group of people or things is the small number of members which form the most important part of the group.
1. The Civic Movement could be the nucleus of a centrist party of the future.
  公民运动的成员可能会成为未来中间派政党的核心。

noun

the central structure of the lens that is surrounded by the cortex
Synonym:lens nucleus
a part of the cell containing DNA and RNA and responsible for growth and reproduction
Synonym:cell nucleuskaryon
any histologically identifiable mass of neural cell bodies in the brain or spinal cord
a small group of indispensable persons or things
1. five periodicals make up the core of their publishing program
Synonym:corecore group
the positively charged dense center of an atom
(astronomy) the center of the head of a comet