The Collaborative International Dictionary of English v.0.48:

Pharmaceutic \Phar`ma*ceu"tic\ (f[aum]r`m[.a]*s[=u]"t[i^]k),
Pharmaceutical \Phar`ma*ceu"tic*al\ (-t[i^]*kal), a. [L.
   pharmaceuticus, Gr. farmakeytiko`s, fr. farmakey`ein: cf. F.
   pharmaceutique. See Pharmacy.]
   Of or pertaining to the knowledge or art of pharmacy, or to
   the art of preparing medicines according to the rules or
   formulas of pharmacy; as, pharmaceutical preparations. --
   Phar`ma*ceu"tic*al*ly, adv.
   [1913 Webster]

   Pharmaceutical chemistry, that department of chemistry
      which ascertains or regulates the composition of medicinal
      substances.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pharmaceutical
    adj 1: of or relating to pharmacy or pharmacists; "the
           pharmaceutical industry" [syn: pharmaceutical,
           pharmaceutic]
    2: of or relating to drugs used in medical treatment
    n 1: drug or medicine that is prepared or dispensed in
         pharmacies and used in medical treatment [syn:
         pharmaceutical, pharmaceutic]