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Noun: osmiridium
  1. A hard and corrosion-resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc.
    "Osmiridium's durability made it ideal for fountain pen tips";
    - iridosmine

Derived forms: osmiridiums

Type of: mineral

Encyclopedia: Osmiridium