Dictionary

iridium

noun irid·i·um \i-ˈri-dē-əm\

Definition of IRIDIUM

:  a rare silver-white hard brittle very heavy metallic element — see element table

Origin of IRIDIUM

New Latin, from Latin irid-, iris; from the colors produced by its dissolving in hydrochloric acid
First Known Use: 1804

Rhymes with IRIDIUM

iridium

noun irid·i·um \ir-ˈid-ē-əm\   (Medical Dictionary)

Medical Definition of IRIDIUM

:  a silver-white hard brittle very heavy metallic element of the platinum group used especially in hardening platinum for alloys (as for surgical instruments)—symbol Ir; see element table

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