noun fer·mi·on \ˈfer-mē-ˌän, ˈfər-\

Definition of fermion

  1. :  a particle (as an electron, proton, or neutron) whose spin quantum number is an odd multiple of 12 — compare boson


play \ˌfer-mē-ˈä-nik, ˌfər-\ adjective

Origin and Etymology of fermion

Enrico Fermi + English 2-on

First Known Use: 1947

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