nucleus
名词 nucleus:
a part of the cell containing DNA and RNA and responsible for growth and reproduction
同义词:cell nucleus, karyon
the positively charged dense center of an atom
a small group of indispensable persons or things
同义词:core, core group
(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
any histologically identifiable mass of neural cell bodies in the brain or spinal cord