Uranium fission is when the nucleus of a uranium atom splits into smaller parts, releasing a lot of energy. It is used in nuclear reactors and bombs. Full definition
Today's nuclear power plants use the heat from uranium fission reactions to do nothing more complicated than boil water, making pressurized steam that spins turbines to generate electricity. (discovermagazine.com)
By September, Bohr and Wheeler had produced a thorough theoretical analysis, explaining the physics underlying the fission process and identifying which isotope of uranium fissioned most readily. (sciencenews.org)
The Atomic Age kicked off with a bang on July 16, 1945, with the detonation of a test uranium fission bomb at the Alamogordo Test Range in the New Mexico desert, during what's known as the «Golden Age» of comic books and strips. (scientificamerican.com)