( 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.
( 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.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012