from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A greenish crystalline compound, FeSO4·7H2O, used as a pigment, fertilizer, and feed additive, in sewage and water treatment, and as a medicine in the treatment of iron deficiency. Also called copperas.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. (dated) iron(II) sulfate
Sorry, no etymologies found.