Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “fission”

See all translations

fission

noun [U] uk   /ˈfɪʃ.ən/ us  
specialized physics the process of dividing the nucleus of an atom, which results in the release of a large amount of energy : nuclear fission specialized biology the division of a living cell as part of reproduction: The fission of the cell could be inhibited with certain chemicals.
Translations of “fission”
in Spanish fisión…
in French fission…
in German die Spaltung…
in Chinese (Traditional) (核)裂變,分裂, 細胞分裂, 裂殖…
in Chinese (Simplified) (核)裂变,分裂, 细胞分裂, 裂殖…
(Definition of fission from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of fission?
Add Cambridge dictionaries to your browser to your website

Definitions of “fission” in other dictionaries

Word of the Day

past participle

the form of a verb, usually made by adding -ed, used in some grammatical structures such as the passive and the present perfect

Word of the Day

Euphemisms (Words used to Avoid Offending People)

by Kate Woodford,
March 04, 2015
​​​ We recently looked at the language that we use to describe lies and lying. One area of lying that we considered was ‘being slightly dishonest, or not speaking the complete truth’. One reason for not speaking the complete truth is to avoid saying something that might upset or offend people. Words and

Read More 

snapchat verb

March 02, 2015
to send someone a message using the photomessaging application Snapchat We used to have a thing until he got a girlfriend. now

Read More