1. 
   Platiniridium
   Plat`i·ni·rid'i·um noun (Chem. & Min.) A natural alloy of platinum and iridium occurring in grayish metallic rounded or cubical grains with platinum.
   Found op http://www.encyclo.co.uk/webster/P/103
   
   
2. 
   platiniridium
   <chemistry> A natural alloy of platinum and iridium occurring in grayish metallic rounded or cubical grains with platinum. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?platiniridium
   
   
3. 
   Platiniridium
   • (n.) A natural alloy of platinum and iridium occurring in grayish metallic rounded or cubical grains with platinum.
   Found op http://thinkexist.com/dictionary/meaning/platiniridium/
   
   
4. 
   platiniridium
   (from the article `platinum`) ...11 percent iron, plus the other platinum metals, and gold, copper, and nickel. For mineralogical properties, see native element (table). Platinum ...
   Found op http://www.britannica.com/eb/a-z/p/78
   
   

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