In pairticle pheesics, a fermion (a name coined bi Paul Dirac frae the surname o Enrico Fermi) is ony subatomic pairticle chairacterised bi Fermi–Dirac stateestics. Thir pairticles obey the Pauli exclusion principle. Fermions include aw quarks an leptons, as well as ony composite pairticle made o an odd nummer o thir, such as aw baryons an mony atoms an nuclei. Fermions differ frae bosons, which obey Bose–Einstein stateestics.
- Notes on Dirac's lecture Developments in Atomic Theory at Le Palais de la Découverte, 6 December 1945, UKNATARCHI Dirac Papers BW83/2/257889. See note 64 on page 331 in "The Strangest Man: The Hidden Life of Paul Dirac, Mystic of the Atom" by Graham Farmelo