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

The buildable, full-coverage formula disguises hyperpigmentation without feeling heavy, while zinc oxide provides broad-spectrum SPF 50+ to help keep discoloration from worsening. —Christa Joanna Lee, Allure, 22 Aug. 2025

Extra virgin olive oil is the main ingredient in his sunscreen product, alongside a few other organic ingredients and zinc oxide, one of the chemicals the FDA deems generally recognized as safe and effective (GRASE) for use in sunscreens. —Jasmine Laws, MSNBC Newsweek, 30 July 2025

However, these formulas can leave a white cast due to zinc oxide’s white hue. —Jené Luciani Sena , Caitlyn Martyn May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 28 July 2025

Active ingredients: Titanium dioxide, zinc oxide | SPF: 50 | Size: 5 oz. —Brigitt Earley, Glamour, 23 July 2025

Word History

First Known Use

1849, in the meaning defined above

Rhymes for zinc oxide

• actinide
• aldehyde
• alkoxide
• alongside
• amplified
• arsenide
• beautified
• biocide
• butoxide
• calcified
• ceramide
• certified

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)