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noun Zirconium  n.  (Chem.) A rare element of the carbon-silicon group, intermediate between the metals and nonmetals, obtained from the mineral zircon as a dark sooty powder, or as a gray metallic crystalline substance. Symbol Zr. Atomic weight, 90.4. 
 
 
 
  
 Collaborative International Dictionary of English 0.48 
 
  
 
 
  
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