\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.

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