Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
acid-forming is an adjective meaning "yielding an acid in aqueous solution". It carries one recorded sense.
yielding an acid in aqueous solution
Definitions, synonyms and semantic relations for acid-forming come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.