mu-meson

• mu meson

From mu + meson.

mu-meson (plural mu-mesons)

1. (dated) A muon (kind of subatomic particle).
   • 1965, Richard Phillips Feynman, The Character of Physical Law, M.I.T. Press, page 157:

     One instance of an unexpected result is the mu meson and its neutrino, which was not guessed by anybody at all before it was discovered, and even today nobody yet has any method of guessing by which this would be a natural result.