iridium

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noun irid·i·um \ i-ˈri-dē-əm \
Updated on: 11 Sep 2017

Definition of iridium

:a rare silver-white hard brittle very heavy metallic element — see Chemical Elements Table

Recent Examples of iridium from the Web

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Origin and Etymology of iridium

Greek īrid-, îris "rainbow, iridescent halo around the moon, a flame, etc., 1iris" + New Latin -ium -ium; from the colors produced by dissolving it in hydrochloric acid
Note: The word iridium was introduced by the English chemist Smithson Tennant (1761-1815) in Philosophical Transactions of the Royal Society, 1804, Part II, p. 414: "As it is necessary to give some name to bodies which have not been known before, and most convenient to indicate by it some characteristic property, I should incline to call this metal Iridium, from the striking variety of colours which it gives, while dissolving in marine acid."


IRIDIUM Defined for Kids

iridium

play
noun irid·i·um \ i-ˈri-dē-əm \

Definition of iridium for Students

:a hard brittle heavy metallic chemical element

Medical Dictionary

iridium

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noun irid·i·um \ ir-ˈid-ē-əm \

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 Chemical Elements Table


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