Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
mu-meson is a noun meaning "an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino". It carries one recorded sense.
an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino
Definitions, synonyms and semantic relations for mu-meson come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.