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| nuclear fission | |||
| nuclear fission The division of an atomic nucleus into parts of comparable mass; usually restricted to heavier nuclei such as isotopes of uranium, plutonium, and thorium | |||
| fission | |||
| fisión nuclear: 14 phrases in 5 subjects |
| Electronics | 3 |
| Natural sciences | 3 |
| Nuclear physics | 6 |
| Physical sciences | 1 |
| Research and development | 1 |