• A rare metallic element, of the same group as platinum, whichit much resembles, being silver-white, but harder, and brittle, andindifferent to most corrosive agents. With the exception of osmium,it is the heaviest substance known, its specific gravity being 22.4.Symbol Ir. Atomic weight 192.5.


    Iridium meaning & definition 1 of Iridium.


  • a very hard yellowish-white metal

    Iridium meaning & definition 2 of Iridium.


  • The chemical element of atomic number 77, a hard, dense silvery-white metal.

    Iridium meaning & definition 3 of Iridium.

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