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