Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
demyelination is a noun meaning "loss of the myelin covering of some nerve fibers resulting in their impaired function". It carries one recorded sense.
loss of the myelin covering of some nerve fibers resulting in their impaired function
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 demyelination come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.