zinc oxide

noun

Definition of zinc oxide

: 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

Out are summers spent perched on a lifeguard chair slathered in zinc oxide, schlepping clubs on fairways or stacking boxes in a warehouse. Robert Channick, chicagotribune.com, "High school students shunning character-building summer jobs for classes, academic camps and resume-worthy activities," 25 July 2019 Decades ago, the sunscreens that Americans were dabbing on their noses were often mineral concoctions, like zinc oxide and titanium dioxide, that sat on the skin in a thick white cream and physically blocked the sun’s rays. Kim Tingley, New York Times, "When You Wear Sunscreen, You’re Taking Part in a Safety Study," 23 July 2019 Those chemical reactions are reversible, unlike the formation of zinc oxide, which is what lets the electrons and the lithium ions flow back and forth over many cycles of charging and discharging. Robert Masse, The Conversation, "How do lithium-ion batteries work?," 15 July 2019 Physical sunscreens contain mineral ingredients—like titanium dioxide or zinc oxide—and sit on top of the skin to deflect and distribute damaging UVA and UVB rays away from the skin. Susan Brickell, Health.com, "What Does SPF Stand For? We Asked Dermatologists," 21 June 2019 Instead, opt for SPF options that feature natural minerals like zinc oxide. Diana Nguyen, Harper's BAZAAR, "A Dermatologist’s Summer Skincare Plan," 7 June 2019 Josh Rosebrook Nutrient Day Cream with SPF 30 ($95), which contains zinc oxide, a natural form of sun protection. Glamour, "I’m 25, Live in L.A., and Spend $3,124 on My Beauty Routine," 15 Apr. 2019 The new announcement proposes that: Only two ingredients – zinc oxide and titanium dioxide – are generally recognized safe and effective. Caroline Picard, Good Housekeeping, "What the New Proposed FDA Sunscreen Regulations Mean for You," 22 Feb. 2019 Luckily, nearly every brand has options with the two reef-safe active ingredients — zinc oxide and titanium dioxide — available. Jessica Chia, Allure, "Why Reef Safe Sunscreen Is Important in the Age of Global Warming," 19 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'zinc oxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of zinc oxide

1849, in the meaning defined above

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More Definitions for zinc oxide

zinc oxide

noun

Medical Definition of zinc oxide

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