English-English Dictionary

Meaning of the word nucleus in English

What does nucleus mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

nucleus

US /ˈnuː.kli.əs/
UK /ˈnuː.kli.əs/
"nucleus" picture

Noun

1.

the central and most important part of an object, movement, or group, forming the basis for its activity and growth

Example:
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The family forms the nucleus of society.
•
The city center is the nucleus of economic activity.
Synonym:
corecenterhearthubkernel
2.

the central part of an atom, containing protons and neutrons

Example:
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The atomic nucleus contains most of the atom's mass.
•
Nuclear reactions occur within the nucleus.
3.

a dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material

Example:
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The cell's nucleus controls its growth and reproduction.
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DNA is stored within the nucleus of the cell.
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