名詞 nucleus:

1. a part of the cell containing DNA and RNA and responsible for growth and reproduction
   同義詞：cell nucleus, karyon
2. the positively charged dense center of an atom
3. a small group of indispensable persons or things
   同義詞：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.
   細(xì)胞核液細(xì)胞核中無色的液體成分
2. The nutritive tissue that is derived from the nucleus and surrounds the embryo of the seed.
   外胚乳包在種子胚芽外，產(chǎn)生于細(xì)胞核的營(yíng)養(yǎng)性組織
3. These 1000 books will form the nucleus of the new school library.
   這一千本書將構(gòu)成學(xué)校新圖書館藏書的基礎(chǔ)。

nu.cle.us

n.（名詞）
【復(fù)數(shù)】 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，其他部分被聚集或組合到它的周圍；核心：
例句：
the nucleus of a city.
市中心

Something regarded as a basis for future development and growth; a kernel:
起點(diǎn)，開始：被作為進(jìn)一步發(fā)展或生長(zhǎng)的基礎(chǔ)的事物；核心：
例句：
a few paintings that formed the nucleus of a great art collection.
一個(gè)大型藝術(shù)收藏的最初的幾張畫

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.
【生物學(xué)】 細(xì)胞核：活細(xì)胞之內(nèi)大的、有膜的、常為球形的細(xì)胞質(zhì)結(jié)構(gòu)，含有細(xì)胞遺傳物質(zhì)并控制其新陳代謝、生長(zhǎng)和繁殖
Botany
【植物學(xué)】
The central kernel of a nut or seed.
籽仁：堅(jiān)果或種子中心的仁
The center of a starch granule.
淀粉顆粒的中心
Anatomy A group of specialized nerve cells or a localized mass of gray matter in the brain or spinal cord.
【解剖學(xué)】 神經(jīng)核：一組專門的神經(jīng)細(xì)胞或存在于大腦或脊髓中灰物質(zhì)的局部塊
Physics The positively charged central region of an atom, composed of protons and neutrons and containing almost all of the mass of the atom.
【物理學(xué)】 原子核：原子的正極中心部分，由質(zhì)子和中子構(gòu)成，幾乎集中了原子的全部質(zhì)量
Chemistry A group of atoms bound in a structure, such as a benzene ring, that is resistant to alteration in chemical reactions.
【化學(xué)】 環(huán)（晶）核：包圍在抗化學(xué)反應(yīng)變化的結(jié)構(gòu)中的一組原子，如苯環(huán)
Astronomy
【天文學(xué)】
The central portion of the head of a comet.
彗核：彗星頭部的中心部分
The central or brightest part of a nebula or galaxy.
核：星云或銀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.
【氣象學(xué)】 凝結(jié)核：水汽分子在其上積聚并在自由空氣中形成小滴或冰晶的粒子

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