[myoo-oh-nee-uh m]

noun Physics.

an electron and a positively charged muon bound together by electrical attraction in the same manner as the electron and proton in a hydrogen atom.

Nearby words

  1. muon,
  2. muon neutrino,
  3. muon-catalysed fusion,
  4. muon-neutrino,
  5. muonic atom,
  6. muppet,
  7. mur,
  8. mura,
  9. muraenid,
  10. murage

Origin of muonium

1955–60; mu(on) + -onium, probably extracted from positronium Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019