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