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WordReference Random House Unabridged Dictionary of American English © 2024fer′ric ox′ide, [Chem.]- Chemistrya dark-red, crystalline, water-insoluble solid, Fe2O3, occurring naturally, as hematite and rust, or synthesized: used chiefly as a pigment, as a mordant, as a coating for magnetic recording tape, and in the manufacture of polishing compounds. Also called iron oxide.
Collins Concise English Dictionary © HarperCollins Publishers:: ferric oxide n - a red crystalline insoluble oxide of iron that occurs as haematite and rust and is made by heating ferrous sulphate: used as a pigment and metal polish (jeweller's rouge), and as a sensitive coating on magnetic tape. Formula: Fe2O3
Systematic name: iron (III) oxide
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