Source : Webster's Revised Unabridged Dictionary (1913)

Depolarize \De*po"lar*ize\, v. t. [imp. & p. p. {Depolarized};
   p. pr. & vb. n. {Depolarizing}.] [Pref. de- + polarize: cf.
   F. d['e]polarizer.]
   1. (Opt.) To deprive of polarity; to reduce to an unpolarized
      condition.

   Note: This word has been inaccurately applied in optics to
         describe the effect of a polarizing medium, as a
         crystalline plate, in causing the reappearance of a
         ray, in consequence of a change in its plane of
         polarization, which previously to the change was
         intercepted by the analyzer.

   2. (Elec.) To free from polarization, as the negative plate
      of the voltaic battery.

Source : WordNet®

depolarize
     v : eliminate the polarization of [syn: {depolarise}]