isospin

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noun iso·spin \ ˈī-sə-ˌspin \

Definition of isospin

:a quantum characteristic of a group of closely related subatomic particles (such as a proton and a neutron) handled mathematically like ordinary spin with the possible orientations in a hypothetical space specifying the number of particles of differing electric charge comprising the group called also isotopic spin

First Known Use of isospin

1961


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