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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
m-theory is a noun meaning "(particle physics) a theory that involves an eleven-dimensional universe in which the weak and strong forces and gravity are unified and to which all the string theories belong". It carries one recorded sense.
(particle physics) a theory that involves an eleven-dimensional universe in which the weak and strong forces and gravity are unified and to which all the string theories belong
particle physics
Definitions, synonyms and semantic relations for m-theory come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.