noun
1.
‘the fission of uranium atoms in a chain reaction’
‘a fission product’
2.Division or splitting into two or more parts.
‘the party dissolved into fission and acrimony’
‘Several of these new departments have been reorganised on a number of occasions to accommodate shifting trends in policy, through what might be referred to as a process of fission and fusion.’
3.Reproduction by means of a cell or organism dividing into two or more new cells or organisms.
‘bacteria divide by transverse binary fission’
‘Primarily they reproduce asexually, which they accomplish by binary fission, or simple cell division.’
verb
1.(chiefly of atoms) undergo fission.
‘these heavy nuclei can also fission’
‘Most of the transuranium elements have isotopes that disintegrate by fissioning in addition to emitting alpha particles.’
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