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Definition of Iridosmine
1. Noun. 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..
Definition of Iridosmine
1. n. The native compound of iridium and osmium. It is found in flattened metallic grains of extreme hardness, and is often used for pointing gold pens.
Definition of Iridosmine
1. [n -S]