noun
fermion
Technical term in physics for particles that obey Fermi–Dirac statistics, such as electrons and protons.
電子はフェルミ粒子の一種です。
Electrons are a type of fermion.
ボース粒子 (boson) is the counterpart to フェルミ粒子; bosons obey Bose–Einstein statistics and can occupy the same quantum state, unlike fermions.
From Italian physicist Enrico Fermi's name (フェルミ) + 粒子 (particle).