from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A white to blue-green crystalline compound, FeSO4, occurring in nature as various hydrate minerals such as copperas, and used as a pigment, fertilizer, and feed additive, in sewage and water treatment, and as a medicine in the treatment of iron deficiency.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun US (
dated) iron(II) sulfate
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