iridosmine /ir-i-dozˈmin, īr- or -dosˈ/ or iridosmium /ir-i-dozˈmi-əm, īr- or -dos/

A native alloy of iridium and osmium used for pen-points, also called osmiridium

osmium /osˈ or ozˈmi-əm/

A hard, dense, grey metallic element (symbol Os; atomic no 76), whose tetroxide has a disagreeable smell

osˈmate or osˈmiate noun

A salt of the hypothetical osmic acid

osˈmic adjective

1. Containing osmium in higher valency
2. Relating to smells or to the sense of smell

osˈmious or osˈmous adjective

Containing osmium in lower valency

osmiridˈium noun

Iridosmine

osmic acid noun

1. Strictly, a supposed acid H₂OsO₄
2. Usu osmium tetroxide, an ill-smelling substance used as a stain for fats in optical microscopy and as a heavy metal deposit in electron microscopy

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