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