nucleus

名词 nucleus:

1. a part of the cell containing DNA and RNA and responsible for growth and reproduction
   同义词：cell nucleus, karyon
2. the positively charged dense center of an atom
3. a small group of indispensable persons or things
   同义词：core, core group
4. (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail
5. any histologically identifiable mass of neural cell bodies in the brain or spinal cord

1. The colorless, liquid component of the cell nucleus.
   细胞核液细胞核中无色的液体成分
2. The nutritive tissue that is derived from the nucleus and surrounds the embryo of the seed.
   外胚乳包在种子胚芽外，产生于细胞核的营养性组织
3. These 1000 books will form the nucleus of the new school library.
   这一千本书将构成学校新图书馆藏书的基础。

nu.cle.us

n.（名词）
【复数】 nu.cle.i[-klô-o.] 或 nu.cle.us.es
A central or essential part around which other parts are gathered or grouped; a core:
核，核心，中心：中心或根本的部分，其他部分被聚集或组合到它的周围；核心：
例句：
the nucleus of a city.
市中心

Something regarded as a basis for future development and growth; a kernel:
起点，开始：被作为进一步发展或生长的基础的事物；核心：
例句：
a few paintings that formed the nucleus of a great art collection.
一个大型艺术收藏的最初的几张画

Biology A large, membrane-bound, usually spherical protoplasmic structure within a living cell, containing the cell`s hereditary material and controlling its metabolism, growth, and reproduction.
【生物学】 细胞核：活细胞之内大的、有膜的、常为球形的细胞质结构，含有细胞遗传物质并控制其新陈代谢、生长和繁殖
Botany
【植物学】
The central kernel of a nut or seed.
籽仁：坚果或种子中心的仁
The center of a starch granule.
淀粉颗粒的中心
Anatomy A group of specialized nerve cells or a localized mass of gray matter in the brain or spinal cord.
【解剖学】 神经核：一组专门的神经细胞或存在于大脑或脊髓中灰物质的局部块
Physics The positively charged central region of an atom, composed of protons and neutrons and containing almost all of the mass of the atom.
【物理学】 原子核：原子的正极中心部分，由质子和中子构成，几乎集中了原子的全部质量
Chemistry A group of atoms bound in a structure, such as a benzene ring, that is resistant to alteration in chemical reactions.
【化学】 环（晶）核：包围在抗化学反应变化的结构中的一组原子，如苯环
Astronomy
【天文学】
The central portion of the head of a comet.
彗核：彗星头部的中心部分
The central or brightest part of a nebula or galaxy.
核：星云或银河的中心或最亮部分
Meteorology A particle on which water vapor molecules accumulate in free air to form a droplet or ice crystal.
【气象学】 凝结核：水汽分子在其上积聚并在自由空气中形成小滴或冰晶的粒子

来源：
Latin nuculeus, nucleus [kernel]
拉丁语 nuculeus, nucleus [核，核心]
from nucula [little nut]
源自 nucula [小核心]
diminutive of nux nuc- [nut]
nux的小后缀 nuc- [核心]