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isospin

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noun iso·spin \ˈī-sə-ˌspin\

Definition of isospin

  1. :  a quantum characteristic of a group of closely related subatomic particles (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



1961

First Known Use of isospin

1961


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expressing little or no emotion

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