Longman Dictionary of Contemporary English homepage

Topic: PHYSICS

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

fission

noun
     
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
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