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Word of the Day Tuesday, June 9, 2026

nucleus

/ˈnjuːkliːəs/ noun · British & US
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What does nucleus mean?

noun

The central or most important part of something; the core or essence of something. In biology, the nucleus is the control center of a cell.

Example

"The nucleus of the atom is made up of protons and neutrons."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for nucleus

Antonyms of nucleus

Rhymes with nucleus

Etymologically related