tungsten car bide

tungsten carbide

a very hard, black or gray compound of tungsten and carbon, used in the manufacture of cutting and abrasion tools, dies, and wear-resistant machine parts.
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World English Dictionary
tungsten carbide
a fine very hard crystalline grey powder produced by heating tungsten and carbon to a very high temperature: used in the manufacture of drill bits, dies, etc. Symbol: WC; melting pt: 2870°C

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
tungsten carbide  
An inorganic carbon compound that forms a fine gray powder whose grains are dense and extremely hard. tungsten carbide is used in tools, dies, wear-resistant machine parts, and abrasives. Chemical formula: WC.
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