Source : Webster's Revised Unabridged Dictionary (1913)

Gravimetric \Grav"i*met"ric\, a. (Chem.)
   Of or pertaining to measurement by weight; measured by
   weight. -- {Grav"i*met"ric*al*ly}, adv.

   {Gravimetric analysis} (Chem.), analysis in which the amounts
      of the constituents are determined by weight; -- in
      distinction from {volumetric analysis}.

Source : WordNet®

gravimetric analysis
     n : quantitative analysis by weight