Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
fomentation is a noun meaning "a substance used as a warm moist medicinal compress or poultice". It carries 3 recorded senses.
a substance used as a warm moist medicinal compress or poultice
application of warm wet coverings to a part of the body to relieve pain and inflammation
deliberate and intentional triggering (of trouble or discord)
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 fomentation come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.