Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: fissus, past participle of findere 'to split'

fission

 noun
     
Related topics: Biology, Physics
fis‧sion [uncountable] technical
1HP the process of splitting an atom to produce large amounts of energy or an explosion [↪ fusion]
2HB the process of dividing a cell into two or more parts
Definition from the Longman Dictionary of Contemporary English
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