acetophenone

noun
ace·​to·​phe·​none | \ ˌas-ə-tō-fə-ˈnōn , ə-ˈsēt-ō- \

Medical Definition of acetophenone

: a colorless liquid ketone CH3COC6H5 formerly used as a hypnotic but now used chiefly in perfumery

called also hypnone

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