'fermion' definitions:

Definition of 'fermion'

(from WordNet)
noun
Any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle

Definition of 'fermion'

From: GCIDE
  • fermion \fermion\ n. any particle that obeys Fermi-Dirac statistcs and is subject to the Pauli exclusion principle. [WordNet 1.5]