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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Bemotrizinol joins zinc oxide and titanium dioxide on the FDA’s GRASE list. Michael Scaturro, Miami Herald, 15 June 2026 Both zinc oxide and titanium dioxide are mineral UV filters. Maria Godoy, NPR, 13 June 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 Bemotrizinol joins zinc oxide and titanium dioxide on the FDA’s GRASE list. Kff Health News, Oc Register, 10 June 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 18 Jun. 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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