|asə(ˌ)tōfəˈnōn, əˌsēd.ō- noun
( -s )
Etymology: International Scientific Vocabulary acet- + -phenone; probably originally formed as French acétophénone
: a colorless liquid ketone CH 3 COC 6 H 5 found in certain essential oils but prepared synthetically (as from acetic anhydride and benzene in the presence of aluminum chloride) and used chiefly in perfumery — called also hypnone, phenyl methyl ketone