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

Only those with zinc oxide and titanium dioxide are allowed to be sold and used. —Kathleen Wong, USA Today, 12 Dec. 2025

Mineral sunscreens, such as zinc oxide and titanium dioxide, form a protective barrier between the skin and the sun. —Deidre McPhillips, CNN Money, 11 Dec. 2025

Additional layers of zinc oxide and a polymer form a barrier that blocks thermal noise, or dark current, while still allowing signal carriers to move efficiently. —Neetika Walter, Interesting Engineering, 1 Dec. 2025

As the liner is knitted with pharmaceutical-grade zinc oxide, the brand clearly discloses that those with an allergy or sensitivity to the antimicrobial compound should steer clear. —Alexandra Harrell, Sourcing Journal, 27 Nov. 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)