- a small coin of ancient Greece
- a former monetary unit of modern Greece, equal to of a drachma
Origin of leptonClassical Greek ; from leptos, thin, small ; from lepein, to peel: see leper
Origin of leptonlept(o)- + -on
Origin of leptonlepto– + –on1.
(plural lepta or leptons)
From Ancient Greek Î»ÎµÏ€Ï„ÏŒÎ½ (lepton), neuter form of Î»ÎµÏ€Ï„ÏŒÏ‚ (leptos, “small").
- An elementary particle with a spin of 1/2 (a fermion) which is immune to the strong nuclear force (including the electron, the muon, the neutrino and the tauon).
From Ancient Greek Î»ÎµÏ€Ï„ÏŒÏ‚ (leptos) +"Ž -on.