blue vitriol
noun Chemistry, Mineralogy.
a salt, copper sulfate, CuSO4⋅5H2O, occurring naturally as large transparent, deep-blue triclinic crystals, appearing in its anhydrous state as a white powder: used chiefly as a mordant, insecticide, fungicide, and in engraving.
Origin of blue vitriol
First recorded in 1760–70
Words nearby blue vitriol
blue thistle,
blue tit,
blue vein,
blue velvet,
blue verditer,
blue vitriol,
blue wavey,
blue whale,
blue whistler,
blue wood aster,
blue-arsed fly
British Dictionary definitions for blue copperas
blue vitriol
noun
the fully hydrated blue crystalline form of copper sulphate
Scientific definitions for blue copperas
blue vitriol
A blue, crystalline compound of copper sulfate. Blue vitriol is soluble in water, and is a very important industrial salt of copper. It is used in insecticides and germicides, in electrolytes for batteries, and in electroplating baths. Chemical formula: CuSO4·5H2O.