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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Each of its 12 shades is powered by a 20.9% zinc oxide for mineral UVA and UVB protection, whipped into a lightweight cream that evens skin tones to a nourishing finish. Kiana Murden, Vogue, 11 July 2025 This formula blends zinc oxide and iron oxide to block UVA and UVB rays, and can even help block out blue light. Alanna Martine Kilkeary, Glamour, 9 July 2025 Next time someone burns their finger while cooking, quickly put some diaper rash ointment that contains zinc oxide on the burn. Caleb Harris, Austin American Statesman, 2 July 2025 It’s formulated with reef-safe zinc oxide and hyaluronic acid adds a boost of hydration. Rebecca Shinners, Travel + Leisure, 21 June 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 16 Jul. 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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