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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
With the research and data coming out, the European Union, out of an abundance of caution, decided to pull the additive titanium dioxide from its food supply, forcing companies to seek alternatives.9 Skittles, for example, had to change its formula in Europe.
—Emily Nadal, Parents, 1 Oct. 2024
In 2013, Snaith unveiled a cell using a layer of perovskite without titanium dioxide nanoparticles, simplifying the cell’s architecture and pushing its efficiency above 15 percent.
—IEEE Spectrum, 25 June 2014
Food Additives Food additives such as aluminum, titanium dioxide (TiO2), and microparticles/nanoparticles.
—Anna Giorgi, Verywell Health, 28 Oct. 2024
Mineral sunscreens with zinc oxide or titanium dioxide are great for sensitive skin, but chemical sunscreens packed with hydration work just as well.
—Christa Joanna Lee, Allure, 22 Oct. 2024
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Word History
First Known Use
1877, in the meaning defined above
Dictionary Entries Near titanium dioxide
Cite this Entry
“Titanium dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/titanium%20dioxide. Accessed 24 Jan. 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
Britannica.com: Encyclopedia article about titanium dioxide
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