How to Use iron oxide in a Sentence

iron oxide

noun
  • Low-iron glass is made from ultrapure sand that is low in iron oxide.
    — Aki Ishida, The Conversation, 10 Sep. 2025
  • Over time, the iron weathers to form iron oxide, which is the base for the unique pigment.
    — Clarissa Wei, Smithsonian Magazine, 25 Sep. 2020
  • The acid in vinegar reacts with iron oxide and dissolves the rust.
    — Brandee Gruener, Southern Living, 22 June 2026
  • The dunes in the area had a soft red hue due to iron oxide in the sand, which soaked up the sun's energy and held it.
    — Richard Mason, Arkansas Online, 23 Aug. 2020
  • The area gets its name from the reddish tint created by iron oxide deposits.
    — Michael Goldstein, Forbes, 23 Apr. 2022
  • The fentanyl was found in a shipment of iron oxide from China.
    — Fox News, 27 Feb. 2020
  • The Tava is also cross-cut by silvery-gray veins of iron oxide.
    — Liam Courtney-Davies, Discover Magazine, 14 Nov. 2024
  • The hotter Earth melted iron oxide, and the iron sank into the core.
    — Chris Smith, BGR, 23 Mar. 2021
  • The planet is covered in rust or iron oxide, not nuclear waste.
    — Chris Smith, BGR, 23 Mar. 2021
  • Rust, which is also known as iron oxide, gives Mars its reddish color.
    — Chris Ciaccia, Fox News, 6 Sep. 2020
  • The ripply pinkish stuff between the dunes is made of smaller grains of sand laden with iron oxide -- rust!
    — Phil Plait, Discover Magazine, 7 Dec. 2010
  • Your steel may look shiny after knocking the visible rust off, but there’s still some iron oxide there.
    — Ben Wojdyla, Popular Mechanics, 21 Apr. 2023
  • This triggers a chemical process that results in iron oxide, also known as rust.
    — Halee Miller Van Ryswyk, Better Homes & Gardens, 11 Apr. 2025
  • Also, because iron oxide comes in red, yellow and brown, these stains are available in wood tones only.
    — Washington Post, 7 Sep. 2020
  • For anyone worried about dark spots, iron oxides are the ingredient to watch.
    — Lauren Jarvis-Gibson july 1, Charlotte Observer, 1 July 2026
  • This sand, red from iron oxide, was found at Makena Point, Maui.
    — Discover Magazine, 29 June 2010
  • The dust particles consist of iron oxide, the same chemical as rust.
    — Shi En Kim, Smithsonian Magazine, 18 Oct. 2023
  • Cinnabar was the high-end option for painting things red; more ordinary projects made-do with simple iron oxide.
    — Kiona N. Smith, Ars Technica, 17 Jan. 2020
  • Rather than radioactive tracers, the new method sends an iron oxide contrast agent through the patient's body.
    — John Ericson, Newsweek, 2 Apr. 2014
  • Cliffs streaked red with iron oxide pop against the dark green firs and the iridescent purple and blue mountains in the distance.
    — Julie Jag, The Salt Lake Tribune, 8 Aug. 2022
  • The art that survives today uses a color red, which comes from mixing iron oxide taken from the soil.
    — Joshua Rapp Learn, Discover Magazine, 15 Jan. 2025
  • That fact that water and iron form rust — or iron oxide, chemically speaking — is not up for debate.
    — Paul Smaglik, Discover Magazine, 25 Feb. 2025
  • The painters used ochre that produced a reddish mulberry pigment, which came from the presence of iron oxide.
    — Livia Gershon, Smithsonian Magazine, 23 Feb. 2021
  • The presence of a reddish iron oxide, for instance, indicates that the wildfire burned very hot.
    — Matt Simon, Wired, 18 Aug. 2021
  • Moreover, a rusty hue appeared on the mud’s surface, indicating that an iron oxide had formed.
    — Elizabeth Pennisi, Science | AAAS, 19 Aug. 2020
  • While the red color comes from the iron oxides present, there are a lot of other materials in it, some of which can be toxic.
    — John Timmer, Ars Technica, 24 Jan. 2024
  • Hematite, an abundant iron oxide better known as rust, and its one of the most common minerals on Earth.
    — Georgina Jedikovska, Interesting Engineering, 17 Apr. 2026
  • True Pigments is not the first to extract iron oxide pigments from pollution.
    — Chelsea Lee, CNN, 2 Aug. 2022
  • Bricks are red because the clay they’re made from contains iron oxide, better known as rust, which is also important in our process.
    — Julio M. D'arcy, The Conversation, 11 Aug. 2020
  • But rust—iron oxide, in chemical terms—may be a valuable tool in the sustainable energy tool kit.
    — Emily Matchar, Smithsonian, 26 Aug. 2019

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'iron oxide.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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