Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
sedative-hypnotic is a noun meaning "a sedative that depresses activity of the central nervous system and reduces anxiety and induces sleep". It carries one recorded sense.
a sedative that depresses activity of the central nervous system and reduces anxiety and induces sleep
Definitions, synonyms and semantic relations for sedative-hypnotic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.