Noun
calutron (plural calutrons)
(physics) A form of mass spectrometer used to separate the isotopes of uranium.
A production-scale mass spectrometer named the Calutron was developed during World War II that provided some of the 235 U used for the Little Boy nuclear bomb, which was dropped over Hiroshima in 1945. Source: Internet
Properly the term 'Calutron' applies to a multistage device arranged in a large oval around a powerful electromagnet. Source: Internet