Vitriol \Vit"ri*ol\, v. t. [imp. & p. p. -oledor -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.]

Source: Webster's Revised Unabridged Dictionary (1913)