Synonyms for nucleus

noun

• a part of the cell containing DNA and RNA and responsible for growth and reproduction
• a small group of indispensable persons or things
• the central structure of the lens that is surrounded by the cortex
• any histologically identifiable mass of neural cell bodies in the brain or spinal cord
• (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
• the positively charged dense center of an atom