nuclei
nounUK /ˈnjuːkli.aɪ/
US /ˈnuːkli.aɪ/
Nuclei are the tiny centers inside cells that control what the cell does.
The scientist looked at the nuclei of the cells under a microscope.
OTHER MEANINGS
2. The central parts of atoms where protons and neutrons are found.
Each atom has a nucleus made of protons and neutrons.
3. The main or central parts of something, like a group or idea.
These few people formed the nuclei of the new club.
4. The dense central parts of some cells in biology.
The nuclei in the plant cells were easy to see.