nucleus Meaning in the Cambridge English Dictionary Cambridge dictionaries logo
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of “nucleus” in the English Dictionary

"nucleus" in British English

See all translations

nucleusnoun [C]

uk   /ˈnjuː.kli.əs/  us   /ˈnuː.kli.əs/ (plural nuclei or nucleuses)
specialized physics the central part of an atom, usually made up of protons and neutrons
specialized biology the part of a cell that controls its growth: DNA is stored in the nucleus of a cell.
the nucleus of sth
the group of people or things that are the most important part of something: These three players will form the nucleus of a revised and stronger team.
(Definition of nucleus from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"nucleus" in American English

See all translations

nucleusnoun [C]

 us   /ˈnu·kli·əs/ (plural nuclei  /ˈnu·kliˌɑɪ/ )
the central part of something
People or things that form the nucleus of something are the most important part of it: These two people will form the nucleus of a new management team to promote sales in South America.
physics A nucleus is the central part of an atom.
biology A nucleus is the central part of a cell that controls its growth.
(Definition of nucleus from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of nucleus?
Add Cambridge dictionaries to your browser to your website
A bunch of stuff about plurals
A bunch of stuff about plurals
by ,
May 24, 2016
by Colin McIntosh One of the many ways in which English differs from other languages is its use of uncountable nouns to talk about collections of objects: as well as never being used in the plural, they’re never used with a or an. Examples are furniture (plural in German and many other languages), cutlery (plural in Italian), and

Read More 

Word of the Day

parasol

a type of sunshade (= round frame covered in cloth on a stick) carried especially by women in the past, to give protection from the sun

Word of the Day

convo noun
convo noun
May 23, 2016
informal a conversation The convo around concussions mostly focuses on guys who play football, but Chastain thinks that this whole thing could be a headache for women too.

Read More