nuclear fission

US /ˈnuːkliər ˈfɪʃən/
UK /ˈnuːkliər ˈfɪʃən/
"nuclear fission" picture
1.

a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.

:
The power plant uses nuclear fission to generate electricity.
Scientists are studying the controlled release of energy from nuclear fission.