[lep-ton] 
[-tuh] . | 1. | an aluminum coin of modern Greece, the 100th part of a drachma. |
| 2. | a small copper or bronze coin of ancient Greece. |
[lep-ton] | any of a class of particles with spin of 1/2 that are not subject to the strong force and that are believed to be truly elementary and not composed of quarks or other subunits. The leptons known or believed to exist are the electron and electron-neutrino, the muon and mu-neutrino, and the tau lepton and tau-neutrino. |
| lep·ton (lěp'tŏn') n. Any of a family of elementary particles that participate in the weak interaction, including the electron, the muon, and their associated neutrinos. See Table at subatomic particle. [lepto- + -on1.] lep·ton'ic (-tŏn'ĭk) adj. |
Any one of six elementary particles that are one of the fundamental constituents of matter. Leptons are not affected by the strong force and are not normally found in the nucleus of the atom. The electron and the neutrino are examples of leptons.
lepton lep·ton (lěp'tŏn')
n.
Any of a family of elementary particles that participate in the weak interaction, including the electron and its associated neutrino.
tɒn