Source : Webster's Revised Unabridged Dictionary (1913)

Vitriol \Vit"ri*ol\, v. t. [imp. & p. p. {-oled}or {-olled}; p.
   pr. & vb. n. {-oling} or {-olling}.] [From {Vitriol}, n.]
   1. (Metal.) To dip in dilute sulphuric acid; to pickle.

   2. To vitriolize. [Colloq.]