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ferric oxide

noun Chemistry.

a 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.

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Nearby words

  1. ferriage,
  2. ferric,
  3. ferric ammonium oxalate,
  4. ferric chloride,
  5. ferric chloride test,
  6. ferric sodium oxalate,
  7. ferricyanic acid,
  8. ferricyanide,
  9. ferrier,
  10. ferriferous

Origin of ferric oxide

First recorded in 1880–85
Also called iron oxide.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for ferric oxide

ferric oxide

noun

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: Fe 2 O 3Systematic name: iron (III) oxide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for ferric oxide

ferric oxide

A reddish-brown to silver or black compound which occurs naturally as the mineral hematite and as rust. It is often used as a pigment and a metal polish. Chemical formula: Fe2O3.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.