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lepton1 definition

lep·ton (lep′tän′)

noun pl. lepta lep′ta (-tə)

  1. a small coin of ancient Greece
  2. a former monetary unit of modern Greece, equal to of a drachma

Etymology: Gr < leptos, thin, small < lepein, to peel: see leper

lepton2 definition

lep·ton (lep′tän′)

noun

Particle Physics any of a class of fermions subject to the weak interaction but not the strong interaction, as the electron, neutrino, muon, or tau particle

Etymology: lept(o)- + -on

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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