vit ‧ ri ‧ ol /ˈvɪtriəl/ BrE AmE noun [uncountable]
[ Date: 1300-1400 ; Language: Old French ; Origin: Late Latin vitreolum , from vitreolus 'glassy' , from Latin vitrum ; ⇨ ↑ vitreous ]
1 . formal very cruel and angry remarks that are intended to hurt someone’s feelings
2 . old use ↑ sulphuric acid