Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “nucleus”

See all translations

nucleus

noun [C] uk   /ˈnjuː.kli.əs/ us    /ˈnuː-/ ( 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.
Translations of “nucleus”
in Korean 핵, (세포)핵…
in Arabic نَواة…
in French noyau, nucléus…
in Turkish atom çekirdeğinin merkezi, nükleon, bir şeyin/bir fikrin çekirdeği/özü/esası…
in Italian nucleo…
in Chinese (Traditional) 原子核, 細胞核…
in Russian ядро…
in Polish jądro, trzon…
in Spanish núcleo…
in Portuguese núcleo…
in German der Kern…
in Catalan nucli…
in Japanese 原子核, 細胞核…
in Chinese (Simplified) 原子核, 细胞核…
(Definition of nucleus from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of nucleus?
Add Cambridge dictionaries to your browser to your website

Definitions of “nucleus” in other dictionaries

Word of the Day

punt

a long, narrow boat with a flat bottom and a square area at each end, moved by a person standing on one of the square areas and pushing a long pole against the bottom of the river

Word of the Day

Byronic, Orwellian and Darwinian: adjectives from names.

by Liz Walter,
April 15, 2015
Becoming an adjective is a strange kind of memorial, but it is often a sign of a person having had real influence on the world. Science is full of examples, from Hippocrates, the Greek medic born around 460 BC, who gave his name to the Hippocratic Oath still used by doctors today,

Read More 

dumbwalking noun

April 20, 2015
walking slowly, without paying attention to the world around you because you are consulting a smartphone He told me dumbwalking probably wouldn’t be a long-term problem.

Read More