Meaning & use
nucleus
The central part of an atom or cell that contains most of its mass or genetic material.
See it in a sentence
The cell's nucleus holds the DNA that directs its growth and function.
Protons and neutrons are packed tightly together inside an atom's nucleus.
A note on using this word
Also used figuratively for the central or most important part of a group, as in 'the nucleus of the team.'
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. noun
The central, most essential part around which something else is organized.
Three veteran players formed the nucleus of the rebuilding team.
Make it your own
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