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