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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Mineral sunscreens like zinc oxide help to protect against UV and some visible light. Leslie Baumann, Miami Herald, 20 Mar. 2026 The mineral offering, made with non-nano zinc oxide, was designed for sensitive skin and comfortable wear. Jenny Berg, Vogue, 16 Mar. 2026 Above this sits the indium-free chalcopyrite absorber, followed by a 150-nm cadmium sulfide buffer layer, a zinc oxide window layer, and a metallic grid electrode. Bojan Stojkovski, Interesting Engineering, 14 Mar. 2026 As the particles were cooled, the free zinc bound with oxygen to form zinc oxide crystals. New Atlas, 14 Feb. 2026 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 28 Mar. 2026.

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)

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