A former monetary unit of Greece used only in calculations, worth one hundredth of a drachma.
From Greek lepton, neuter of leptos ‘small’.
A subatomic particle, such as an electron, muon, or neutrino, which does not take part in the strong interaction.‘Like quarks and leptons, the Higgs particle also derives its mass from coupling to the Higgs condensate.’
- ‘There are small subatomic particles called leptons.’
- ‘Finally, the EM force acts on electrically charged particles: charged leptons (like electrons), and charged force carriers.’
- ‘These infinitesimal particles are usually grouped into four main categories: the mesons, the baryons, the leptons, and the photons (the most basic unit of electromagnetic radiation).’
- ‘Quarks and charged leptons also feel the electromagnetic force, and quarks feel the strong force.’
1940s from Greek leptos ‘small’ + -on.