hahn

noun

1. Otto,1879–1968, German chemist: Nobel Prize 1944.

noun

1. Kurt. 1886–1974, German educationalist. During the Nazi era he escaped to Britain, where he founded Gordonstoun School (1935) and helped to establish the Duke of Edinburgh’s award scheme
2. Otto (ˈɔto). 1879–1968, German physicist: discovered the radioactive element protactinium with Meitner (1917); with Strassmann, demonstrated the nuclear fission of uranium, when it is bombarded with neutrons: Nobel prize for chemistry 1944

1. German chemist who investigated radioactive elements and helped discover several new ones. His research on the irradiation on uranium and thorium with neutrons led to the 1938 discovery of nuclear fission.