from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A dark red compound, Fe2O3, occurring naturally as hematite ore and rust and used in pigments and metal polishes and on magnetic tapes.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry The chemical compound Fe2O3, iron oxide where iron has a valence of +3. IUPAC has deprecated this term in favor of iron(III) oxide.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a red oxide of iron


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