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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Both zinc oxide and titanium dioxide are mineral UV filters. Maria Godoy, NPR, 13 June 2026 Those positives contrast with mineral sunscreens, which rely on the broad-spectrum filters zinc oxide or titanium dioxide and can leave a chalky white cast on the skin. Danielle Zickl, Health, 12 June 2026 Bemotrizinol joins zinc oxide and titanium dioxide on the FDA’s GRASE list. Kff Health News, Oc Register, 10 June 2026 The newer version bumps protection up to SPF 50 and pairs zinc oxide with titanium dioxide, two mineral filters that work together to broaden UV coverage while maintaining that barely-there feel. Christa Joanna Lee, Allure, 22 May 2026 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 17 Jun. 2026.

Medical Definition

titanium dioxide

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

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