Iridium Definition

A white, extremely dense, brittle, corrosion-resistant chemical element, one of the platinum metals: alloys of iridium are used in electrodes, pen points, crucibles, etc.: symbol, Ir; at. no. 77
Webster's New World
  • atomic number 77
  • ir

Origin of Iridium

  • From Latin īris īrid- rainbow (from the colors produced by dissolving it in hydrochloric acid) irido– –ium

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Ancient Greek ἶρις (iris, “rainbow”) (because of the bright colour of many of iridium's salts).

    From Wiktionary

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