iridium
noun/ɪˈrɪdiəm/
/ɪˈrɪdiəm/
[uncountable] (symbol Ir)
- a chemical element. Iridium is a very hard yellow-white metal, used especially in making alloys.Word Originearly 19th cent.: modern Latin, from Latin iris, irid- ‘rainbow’ (it has this name because it forms compounds of various colours).
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iridium