You searched for: “iridium
1. Iridium, Ir 192, an artificial radioactive isotope with a half-life of 75 days, used in radiotherapy.
2. A very hard and brittle, exceptionally corrosion-resistant, whitish-yellow metallic element occurring in platinum ores and used principally to harden platinum and in high-temperature materials, electrical contacts, and wear-resistant bearings.
3. Etymology: from 1804, Modern Latin, coined by its discoverer, English chemist Smithson Tennant (1761-1815) from Greek iris, "rainbow"; so called for the varying color of its compounds.

More information is located at Chemical Element: iridium.

This entry is located in the following units: -idium, -idion (page 1) irido-, irid-, iri-, iris- + (page 2) -ium + (page 2)
Information is located at Chemical Element: iridium.
A unit related to: “iridium
(Modern Latin: chemical element; from Greek, iris, a "rainbow", because of the changing color of its salts; metal)