Source : Webster's Revised Unabridged Dictionary (1913)

Acetophenone \Ac`e*to*phe"none\, n. [Acetic + phenyl + one.]
   (Chem.)
   A crystalline ketone, {CH3COC6H5}, 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}.