Noun: blue vitriol bloo'vit-ree-ul
- Hydrated blue crystalline form of copper sulphate
"Gardeners use blue vitriol as a fungicide to protect plants";
- blue copperas, blue stone, chalcanthite
Type of: copper sulfate, copper sulphate [Brit, Cdn], cupric sulfate, cupric sulphate [Brit, Cdn]
Encyclopedia: Blue vitriol