from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A particle, such as an electron, proton, or neutron, having half-integral spin and obeying statistical rules requiring that not more than one in a set of identical particles may occupy a particular quantum state.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A particle with totally antisymmetric composite quantum states, which means it must obey the Pauli exclusion principle and Fermi-Dirac statistics. They have half-integer spin. Among them are many elementary particles, most derived from quarks. Compare boson.

from the GNU version of the Collaborative International Dictionary of English

  • n. any particle that obeys Fermi-Dirac statistcs and is subject to the Pauli exclusion principle.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle


After Enrico Fermi.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Enrico Fermi (Italian-American physicist) + -on. (Wiktionary)


  • At low energies the Higgs gets a vacuum expectation value, and acts like a mass term, converting the left-handed fermion into a right-handed fermion, which is what you want.

    Dark Matter and Fifth Forces

  • The paper laid the basis for describing one of the two categories of the elementary particles that make up an atom - one was boson, and the other came to be known as fermion, after the Italian physicist Enrico Fermi.

    IBN Top Headlines

  • Assuming that this is no error, then the term "fermion" is ambiguous between elementary particle and composite particle.

    Walter Kohn and Density-Functional Theory

  • The phase here is between a heavy fermion and light fermions in an anti-ferromagnetic state.

    Searching for Life in the Multiverse | Universe Today

  • The existence of the superpartner to the Higgs and the fermion field at about the same mass scale results in the cancellation of these divergences.

    First Collisions for the LHC | Universe Today

  • So a Higgs field that couples to the fermion field f and its conjugate f-bar according to an interaction term in the Lagrangian ~ f-barHf, will carry the Higgs divergence as well.

    First Collisions for the LHC | Universe Today

  • It think these internal fermion degrees of freedom behave as Landau electrons around a quantum critical point.

    Einstein Still Rules, Says Fermi Telescope Team | Universe Today

  • Also, one assumes the duality accounts for the discrete spectrum of possible fermion rest masses (perhaps corresponding to a discrete spectrum of possible closed black hole assemblies?)

    Science and Unobservable Things

  • The mass scale characterizing each Kaluza-Klein tower can be chosen independently for each species of scalar, fermion, or gauge boson.

    Aether Compactification

  • In that language there is no fermion propagator and no Higgs insertion - the effect of the Higgs has been summed into our definition of the massive fermion.

    Dark Matter and Fifth Forces

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