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 active ingredients are titanium dioxide and zinc oxide, which serve to block UVA and UVB rays from the sun. —Bestreviews, Mercury News, 10 June 2025

Those with melasma should also consider choosing mineral sun protection (which uses active ingredients titanium dioxide or zinc oxide to reflect the sun’s rays away from skin) over chemical alternatives for their daily sunscreen. —Jenny Berg, Allure, 24 May 2025

Also — always cleanse with lukewarm water and consider using diaper rash cream in the winter, since its zinc oxide component helps curb inflammation and irritation on the face. —Stacia Datskovska, Footwear News, 22 May 2025

Its hypoallergenic formula contains 20% mineral, non-nano zinc oxide, and squalane oil, which is known for hydrating the skin. —Laura Lu, Parents, 19 May 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)