Source : Webster's Revised Unabridged Dictionary (1913)

Acidimetry \Ac`id*im"e*try\, n. [L. acidus acid + -metry.]
   (Chem.)
   The measurement of the strength of acids, especially by a
   chemical process based on the law of chemical combinations,
   or the fact that, to produce a complete reaction, a certain
   definite weight of reagent is required. --
   {Ac`id*i*met"ric*al}, a.

Source : WordNet®

acidimetry
     n : volumetric analysis using standard solutions of acids to
         measure the amount of a base present