zinc oxide

noun

: an infusible white solid ZnO used especially as a pigment, in compounding rubber, and in pharmaceutical and cosmetic preparations (such as ointments and sunblocks)

Examples of zinc oxide in a Sentence

Recent Examples on the Web
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It is powered by zinc oxide, offers SPF 30 protection, and is easy to apply with the applicator brush. Brigitt Earley, Glamour, 2 Apr. 2025 Its zinc oxide protection glides on with luxurious ease, giving skin a healthy, dewy look. Allure, 26 Sep. 2024 Chemical Versus Mineral Sunscreens Ingredients in mineral sunscreens act as physical blockers that reflect the sun’s rays off the skin and are primarily formulated with zinc oxide or titanium dioxide, Massick explains. Korin Miller, Outside Online, 14 Mar. 2025 Wear a mineral sunscreen that blocks the sun's ultraviolet (UV) rays with zinc oxide or titanium dioxide. Carrie Madormo, Rn, Mph, Verywell Health, 27 Jan. 2025 See All Example Sentences for zinc oxide

Word History

First Known Use

1849, in the meaning defined above

Time Traveler
The first known use of zinc oxide was in 1849

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Cite this Entry

“Zinc oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/zinc%20oxide. Accessed 12 Apr. 2025.

Kids Definition

zinc oxide

noun
: a white substance that is used as a white pigment, is added to rubber, and is used in medical and cosmetic preparations (as ointments and sunblocks)

Medical Definition

zinc oxide

noun
: a white solid ZnO used in pharmaceutical and cosmetic preparations (as ointments and powders)

More from Merriam-Webster on zinc oxide

Last Updated: - Updated example sentences
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