The Collaborative International Dictionary of English v.0.48:

phenylacetamide \phenylacetamide\ n.
   A white crystalline compound used as an analgesic and also as
   an antipyretic.

   Syn: acetanilide, acetanilid.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

phenylacetamide
    n 1: a white crystalline compound used as an analgesic and also
         as an antipyretic [syn: acetanilide, acetanilid,
         phenylacetamide]