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zirconium oxide
zir·co·ni·um ox·ide


noun 
Definition:
 
powder used in making heat-resistant materials: a heavy water-insoluble white powder. Use: pigment, abrasive, manufacture of heat-resistant materials and ceramics. ZrO2
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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