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iridium

Pronunciation: /ɪˈrɪdɪəm, ʌɪ-/

Definition of iridium

noun

[mass noun]
  • the chemical element of atomic number 77, a hard, dense silvery-white metal. (Symbol: Ir)

Origin:

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

iridium in other Oxford dictionaries

Definition of iridium in the US English dictionary

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