Definition of osmiridium in US English:

osmiridium

noun

  • A naturally occurring alloy of osmium and iridium, often with traces of other metals; (Mineralogy) an alloy having a cubic crystal structure and in which iridium predominates.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From German Osmiridium (C. F. Naumann Lehrbuch der Mineralogie 545; earlier as Osm-iridium), shortened from Osmium-iridium from Osmium + Iridium.

Pronunciation

osmiridium

/ˌɒzmɪˈrɪdɪəm/