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ferric oxide
noun
: the red or black oxide of iron Fe2O3 found in nature as hematite and as rust and also obtained synthetically and used especially in magnetic materials, as a pigment, and for polishing
Examples of ferric oxide in a Sentence
Recent Examples on the Web
What’s more, the nanoscale particles could be made from readily available, inexpensive minerals, such as ferric oxide and gamma manganese dioxide for the anode and cathode materials, respectively.
—IEEE Spectrum, 24 Dec. 2023
Two irons and three oxygens make ferric oxide, or Fe2O3—a complete picture that’s hard to pull apart.
—Matthew Hutson, The New Yorker, 18 Sep. 2021
So, all in all, Mars is red because of hematite, which is a red form of ferric oxide.
—Ethan Siegel, Forbes, 11 Mar. 2021
The greatest elevations occur in the ferric oxide-rich Tharsis region, but in the lowlands to the east of it, the abundances of ferric oxides plummets.
—Ethan Siegel, Forbes, 11 Mar. 2021
And the worldwide shortage of gamma ferric oxide has brought tape production to a crawl.
—David Grossman, Popular Mechanics, 11 Oct. 2019
The team also found that the asteroid’s chemistry was dominated by compounds called ferric oxides and phyllosilicates, which had never been seen before on Kuiper belt objects.
—New York Times, 10 May 2018
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Word History
First Known Use
1851, in the meaning defined above
Dictionary Entries Near ferric oxide
Cite this Entry
“Ferric oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ferric%20oxide. Accessed 26 Nov. 2024.
Kids Definition
ferric oxide
noun
: the red or black oxide of iron found in nature as hematite and as rust
Medical Definition
ferric oxide
noun
: the red or black oxide of iron Fe2O3 found in nature as hematite and as rust and also obtained synthetically and used as a pigment and for polishing
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