Source : Webster's Revised Unabridged Dictionary (1913)

Mercurialize \Mer*cu"ri*al*ize\, v. t. [imp. & p. p.
   {Mercurialized}; p. pr. & vb. n. {Mercurializing}.]
   1. (Med.) To affect with mercury.

   2. (Photography) To treat with mercury; to expose to the
      vapor of mercury.

Mercurialize \Mer*cu"ri*al*ize\, v. i.
   To be sprightly, fantastic, or capricious. [Obs.]