WordReference Random House Unabridged Dictionary of American English © 2025
blue′ vit′riol, [Chem., Mineral.]
- Chemistry, Mineralogy, Mineralogya 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. Also called blue copperas, chalcanthite, cupric sulfate.
- 1760–70
'blue vitriol' also found in these entries (note: many are not synonyms or translations):