fission
n[U]
1 splitting of the nucleus of an atom with the release of a large amount of energy 裂变: nuclear fission 核裂变.
2 (biology 生) splitting or division of biological cells as a method of reproduction 分裂生殖.
The death of Gandhi gave India a chance to mourn and express how he had become father to all Indians. Millions watched the slow march that took his body through the capital.