Platiniridium

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Platiniridium \Plat`i*ni*rid"i*um\, n. (Chem. & Min.)
     A natural alloy of platinum and iridium occurring in grayish
     metallic rounded or cubical grains with platinum.
     [1913 Webster]