fission
fi shuhn
- n reproduction of some unicellular organisms by division of the cell into two more or less equal parts
- n a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
- Does fallout from nuclear testing endanger the health of the world? Last week only Soviet tests were spraying deadly fission products into the atmosphere, but 20-odd shots had been .
- If fission had come to light in the mid-1930s, while the democracies still slept, Nazi Germany would have won a long lead toward building an atom bomb.
- The Polish Peasant Party, once the largest in Poland, began to show distinct signs of fission last week.