Lepton

Pronunciation

• IPA: /ˈlÉ›ptÉ’n/

From Ancient Greek λεπτόν, neuter form of λεπτός (leptos, "small").

Full definition of lepton

Noun

1. A small, bronze Judean coin from the 1st century BC. The lowest value coin ever in circulation. Considered by some to be the widow's mite.

From Ancient Greek λεπτός + -on.

Noun

1. 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).

Derived terms

• leptonic