Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
autocatalysis is a noun meaning "catalysis in which the catalyst is one of the products of the reaction". It carries one recorded sense.
catalysis in which the catalyst is one of the products of the reaction
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 autocatalysis come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.