Source : Webster's Revised Unabridged Dictionary (1913)

Pharmacology \Phar`ma*col"o*gy\, n. [Gr. fa`rmakon drug + -logy:
   cf. F. pharmacologie.]
   1. Knowledge of drugs or medicines; the art of preparing
      medicines.

   2. A treatise on the art of preparing medicines.

Source : WordNet®

pharmacology
     n : the science or study of drugs: their preparation and
         properties and uses and effects [syn: {pharmacological
         medicine}, {materia medica}]