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Noun: lepton (lepta)  'lep,tón
  1. Former Greek fractional monetary unit; 100 lepta equal to 1 drachma
    "He found an old lepton coin in the ruins"
Noun: lepton[2] (leptons)  'lep,tón
  1. An elementary particle that participates in weak interactions; has a baryon number of 0

Derived forms: lepta, leptons

Type of: elementary particle, fermion, fundamental particle, Greek monetary unit

Part of: drachma, Greek drachma

Encyclopedia: Lepton, West Yorkshire