from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A black powder, FeO, used in the manufacture of steel, green heat-absorbing glass, and enamels.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The chemical compound FeO, iron oxide where iron has a valence of +2. IUPAC has deprecated this term in favor of iron(II) oxide.


ferrous + oxide (Wiktionary)


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