zinc oxide

noun Chemistry, Pharmacology.
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.
Also called flowers of zinc, zinc white.


Origin:
1840–50

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Collins
World English Dictionary
zinc oxide
 
n
flowers of zinc, Also called: 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 10th Edition
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American Heritage
Medical Dictionary

zinc oxide n.
An amorphous white or yellowish powder used as a pigment and in pharmaceuticals and cosmetics.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
zinc oxide  
A white or yellowish powdery compound used in paints and in various medicines and skin cosmetics. Chemical formula: ZnO.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
We've covered this catalyst before being used with zinc oxide, but this is the
  first demonstration with silicon.
Applying zinc oxide and moisturizer around the treated area can protect healthy
  skin.
Tips to prevent future outbreaks include applying a sunblock or lip balm
  containing zinc oxide to the lips when you're outdoors.
Topical antibiotics, saline or zinc oxide dressings, or cocoa butter or oil are
  also used depending on severity.
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