Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
transmutation is a noun meaning "an act that changes the form or character or substance of something". It carries 3 recorded senses.
an act that changes the form or character or substance of something
a qualitative change
(physics) the change of one chemical element into another (as by nuclear decay or radioactive bombardment)
“the transmutation of base metals into gold proved to be impossible”
physics
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for transmutation come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.