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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Only those with zinc oxide and titanium dioxide are allowed to be sold and used. Kathleen Wong, USA Today, 12 Dec. 2025 Mineral sunscreens, such as zinc oxide and titanium dioxide, form a protective barrier between the skin and the sun. Deidre McPhillips, CNN Money, 11 Dec. 2025 Today, they are constructed as a thin layer of titanium dioxide or similar dielectric material sandwiched between two metal electrodes. Perri Thaler, IEEE Spectrum, 27 Nov. 2025 The company provided a full list of ingredients that will be eliminated, including many FD&C dyes and titanium dioxide. Brandee Gruener, Southern Living, 2 Oct. 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 15 Dec. 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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