iron oxide

noun

: any of several oxides of iron: such as
b
: the monoxide FeO of iron

Examples of iron oxide in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Some attribute the difference to the dirt and climate, thanks to pink granite soils laced with silica, quartz, and iron oxide, and steady winds that limit disease pressure. Lauren Mowery, Forbes, 25 Mar. 2025 This is because in the ore found in nature, iron is bound to oxygen, creating iron oxide, more commonly known as rust. Michael Franco, New Atlas, 13 Mar. 2025 But iron oxides come in many flavors, and the exact chemistry of Martian rust has been intensely debated, the study reports. Doyle Rice, USA TODAY, 26 Feb. 2025 Previous analyses of iron oxide on Mars, based only on observations by spacecraft, didn’t detect any evidence of water, which led researchers to believe that the iron oxide must be hematite. Ashley Strickland, CNN, 25 Feb. 2025 See All Example Sentences for iron oxide

Word History

First Known Use

1790, in the meaning defined above

Time Traveler
The first known use of iron oxide was in 1790

Cite this Entry

“Iron oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/iron%20oxide. Accessed 2 Apr. 2025.

Kids Definition

iron oxide

noun
: any of the oxides of iron
especially : ferric oxide

Medical Definition

iron oxide

noun
: any of several oxides of iron
especially : ferric oxide

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