reproduction of some unicellular organisms by division of the cell into two more or less equal parts
"The bacteria multiplied rapidly through fission, splitting each parent cell into two identical offspring every hour."
a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
"The power plant generates electricity by harnessing the immense heat released when uranium atoms undergo fission, splitting their heavy cores into lighter elements."
The process whereby one item splits to become two.
"The teacher explained that nuclear fission occurs when a heavy atom splits into two lighter elements, releasing a massive amount of energy in the process."
To cause to undergo fission.
"The physicist's new machine is designed to trigger nuclear fission in uranium atoms."