(1):
(n.) To vitriolize.
(2):
(n.) To dip in dilute sulphuric acid; to pickle.
(3):
(n.) A sulphate of any one of certain metals, as copper, iron, zinc, cobalt. So called on account of the glassy appearance or luster.
(4):
(n.) Sulphuric acid; - called also oil of vitriol. So called because first made by the distillation of green vitriol. See Sulphuric acid, under Sulphuric.