Definition of iridium in English:

iridium

(also Ir)

Translate iridium into Spanish

Pronunciation /iˈridēəm/ /ɪˈrɪdiəm/

noun

  • The chemical element of atomic number 77, a hard, dense silvery-white metal.

    Iridium is a member of the transition series and is one of the densest metals. Iridium–platinum alloys are hard and corrosion-resistant and are used in jewelry and for electrical contacts

    ‘Jewellery made of platinum, iridium and palladium gleamed majestically, now and then emitting flashes of brilliant light from the studded diamonds.’
    • ‘The new electrochemical system is based on a magnesium anode, a seawater/catholyte electrolyte and an electrocatalyst of palladium and iridium catalyzed on carbon paper.’
    • ‘The earth's crust is depleted in iridium and other platinum group elements, while meteorites are enriched in them.’
    • ‘Previously, it was thought that any asteroid or comet collision would leave strong evidence of the element iridium, the signal found in the sedimentary layer from the time of the dinosaur extinction.’
    • ‘They found the rare element iridium in the thin clay layer that caps the rocks of the Cretaceous era.’

Origin

Early 19th century modern Latin, from Latin iris, irid- ‘rainbow’ (so named because it forms compounds of various colors).

Pronunciation

iridium

/iˈridēəm/ /ɪˈrɪdiəm/