Definition of nucleus
- players who are the nucleus of the team
a college campus that was a nucleus of opposition to the war
the nucleus of the movement's methodology has always been passive resistance
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nucleus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
where it's at;
biology : the central part of most cells that contains genetic material and is enclosed in a membrane
physics : the central part of an atom that is made up of protons and neutrons
: a central or most important part of something
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