Source : Webster's Revised Unabridged Dictionary (1913)

Phenacetin \Phe*nac"e*tin\, Phenacetine \Phe*nac"e*tine\, n.
   [Phenyl + acetic + -in.] (Pharm.)
   A white, crystalline compound, {C10H13O2N}, used in medicine
   principally as an antipyretic.

Source : WordNet®

phenacetin
     n : a white crystalline compound used as an analgesic and also
         as an antipyretic [syn: {acetophenetidin}, {acetphenetidin}]