titanium dioxide

noun

: an oxide TiO2 of titanium that occurs in rutile, anatase, and ilmenite and is used especially as a pigment

Examples of titanium dioxide in a Sentence

Recent Examples on the Web
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Mineral sunscreens rely on zinc oxide and titanium dioxide, which deflect the sun’s rays away from the skin (like a shield). Jené Luciani Sena , Caitlyn Martyn May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 28 July 2025 All courts get re-lined with a mix of titanium dioxide via a transfer wheel marker, rolled and mowed daily during The Championships. Tim Newcomb, Forbes.com, 7 July 2025 However, the active ingredients zinc oxide and titanium dioxide (which reflect UV rays) can leave a white cast on darker skin tones. Ariana Yaptangco, Glamour, 22 Apr. 2025 It's built similarly to a brightening serum—with vitamin C, soothing papaya seed oil, and squalane oil among the ingredients—but uses reflective minerals, like mica and titanium dioxide, to deliver very subtle luminosity to skin. Deanna Pai, Vogue, 21 Apr. 2025 See All Example Sentences for titanium dioxide

Word History

First Known Use

1877, in the meaning defined above

Time Traveler
The first known use of titanium dioxide was in 1877

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Cite this Entry

“Titanium dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/titanium%20dioxide. Accessed 4 Aug. 2025.

Medical Definition

titanium dioxide

noun
: an oxide TiO2 of titanium that is used especially as a pigment and in sunblocks

More from Merriam-Webster on titanium dioxide

Last Updated: - Updated example sentences
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