A monetary unit of Greece until the introduction of the euro, worth one hundredth of a drachma (used only in calculations)→ lepta
From Greek lepton, neuter of leptos small.
A subatomic particle, such as an electron, muon, or neutrino, that does not take part in the strong interaction.
- ‘There are small subatomic particles called leptons.’
- ‘Quarks and charged leptons also feel the electromagnetic force, and quarks feel the strong force.’
- ‘Like quarks and leptons, the Higgs particle also derives its mass from coupling to the Higgs condensate.’
- ‘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).’
1940s: from Greek leptos small + -on.