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.
Enriched with zinc oxide, niacinamide, and vitamin E for a visibly smoother, more even complexion. — ABC News, 2 July 2026 Those positives contrast with mineral sunscreens, which rely on the broad-spectrum filters zinc oxide or titanium dioxide and can leave a chalky white cast on the skin. — Danielle Zickl, Health, 12 June 2026 Both zinc oxide and titanium dioxide are mineral UV filters. — Maria Godoy, NPR, 13 June 2026 Hawaiian Tropic’s zinc oxide formula, a physical UV blocker, brushes on with a matte, translucent finish and leaves no white cast on most skin tones. — Lauren Jarvis-Gibson july 1, Kansas City Star, 2 July 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

Rhymes for zinc oxide

See All Rhymes for zinc oxide

Browse Nearby Words

zincous
zinc oxide
zinc silicate
See all Nearby Words

Cite this Entry

“Zinc oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/zinc%20oxide. Accessed 7 Jul. 2026.

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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

Britannica.com: Encyclopedia article about zinc oxide

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