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A Writer's Dictionary:

iridium Definition


Dictionary Home » Words Starting with I » ion exchange ... ironmaster » iridium


iridium
noun
    1. chem.
      , atomic number 77) a silvery metallic element that is resistant to corrosion, and is mainly used in hard alloys with platinum or osmium to make surgical instruments, pen nibs, bearings, electrical contacts and crucibles.
Etymology: 19c: from Greek iris rainbow, from the colourful appearance of some solutions of its salts.



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