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