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iridium

Syllabification: i·rid·i·um
Pronunciation: /iˈridēəm
 
/

Definition of iridium in English:

noun

The chemical element of atomic number 77, a hard, dense silvery-white metal. (Symbol: Ir)
Example sentences
  • 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.

Origin

early 19th century: modern Latin, from Latin iris, irid- 'rainbow' (so named because it forms compounds of various colors).

Definition of iridium in:

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Word of the day prepotent
Pronunciation: prɪˈpəʊt(ə)nt
adjective
greater than others in power or influence