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zinc oxide

American  

noun

Chemistry, Pharmacology.
  1. a white or yellowish-white, amorphous, odorless, water-insoluble powder, ZnO, used chiefly as a paint pigment, in cosmetics, dental cements, matches, white printing inks, and opaque glass, and in medicine in the treatment of skin conditions.


zinc oxide British  

noun

  1. Also called: flowers of zinc.   philosopher's wool.  a white insoluble powder used as a pigment in paints ( zinc white or Chinese white ), cosmetics, glass, and printing inks. It is an antiseptic and astringent and is used in making zinc ointment. Formula: ZnO

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

zinc oxide Scientific  
  1. A white or yellowish powdery compound used in paints and in various medicines and skin cosmetics. Chemical formula: ZnO.


Etymology

Origin of zinc oxide

First recorded in 1840–50

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

She said some designers are now innovating fabrics with zinc oxide to make the material feel cooler to the touch.

From BBC Aug. 3, 2026

"When I spread it on my own skin, I didn't get that white cast I usually see with zinc oxide," said Addae.

From Science Daily Jul. 20, 2026

One common complaint is that mineral sunscreens containing zinc oxide can leave a noticeable white or gray film on the skin.

From Science Daily Jul. 20, 2026

"By using zinc oxide, we're opening up new frontiers developing efficient and stable qubits, a cornerstone for quantum computing."

From Science Daily Nov. 26, 2024

Her face was smeared with so much zinc oxide that it looked like she’d fallen nose-first into a frosted cake.

From "Flush" by Carl Hiaasen

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