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The Collaborative International Dictionary
Acetophenone

Acetophenone \Ac`e*to*phe"none\ (-f[=e]"n[=o]n), n. [Acetic + phenyl + one.] (Chem.) A crystalline ketone, CH3.CO.C6H5, which may be obtained by the dry distillation of a mixture of the calcium salts of acetic and benzoic acids. It is used as a hypnotic under the name of hypnone.

Wiktionary
acetophenone

n. (context organic compound English) The aromatic ketone ''phenyl methyl ketone'', used in the manufacture of very many organic compounds

Wikipedia
Acetophenone

Acetophenone is the organic compound with the formula CHC(O)CH (also represented by the letters PhAc or BzMe), is the simplest aromatic ketone. This colourless, viscous liquid is a precursor to useful resins and fragrances.