Fermion

General name for a particle that is a matter constituent, characterized by spin in odd half integer quantum units (¹/₂, ³/₂, ⁵/₂...) (independent of frequency and energy level). Named for Italian physicist Enrico Fermi. Quarks, leptons and baryons are all fermions. More Information: Spin
www2.slac.stanford.edu/vvc/glossary.html

A matter particle. Leptons (such as the electron and neutrinos) and quarks are fermions.
hepwww.rl.ac.uk/Pub/Phil/glossary.html

A particle having a spin that is an odd integer multiple of (h-bar)/2.
www.lbl.gov/abc/wallchart/glossary/glossary.html

Any particle that has odd-half-integer (¹/₂, ³/₂, ⁵/₂...) intrinsic angular momentum (spin), measured in units of h-bar. As a consequence of this peculiar angular momentum, fermions obey a rule called the Pauli Exclusion Principle, which states that no two fermions can exist in the same state at the same time. Many of the properties of ordinary matter arise because of this rule. Electrons, protons, and neutrons are all fermions, as are all the fundamental matter particles, both quarks and leptons. members.tripod.com/l_asproni/Atom/atom_glossary.htm

A matter particle. Leptons (such as electrons and neutrinos) and quarks are fermions.
members.tripod.com/~NerdiE/glossary.htm

Fermions are particles with half integer spin (¹/₂, ³/₂, ⁵/₂...). Neutrons and protons are fermions. Gluon
fef.sdu.edu.tr/~iskender/nuc_gloss.html

any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle. www.cogsci.princeton.edu/cgi-bin/webwn

See Also

Boson
Etheric Elements
Hadron
half integer spin
Particles and Corpuscles
Subdivision
Table of Quantum Particles