What do a.m. and p.m. stand for?


[myoo-oh-nee-uh m] /myuˈoʊ ni əm/
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.
Origin of muonium
1955-60; mu(on) + -onium, probably extracted from positronium Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for muonium
  • He was conducting a laser experiment used to measure the energy levels of muonium, an atom consisting of a muon and an electron.
  • Helium gas is used to inhibit muonium formation by positive muons.

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