Noun: iridosmine ,i-ri'dóz-min
- 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.
"iridosmine's durability made it ideal for fountain pen tips";
- osmiridium
Derived forms: iridosmines
Type of: mineral
Encyclopedia: Iridosmine