iridium
noun/ɪˈrɪdiəm/
Frequency rank: #16,584 of 20,003 in the WORDED list (wordfreq data)
Meaning
A rare, dense, silvery-white metallic element (atomic number 77) resistant to corrosion.
Example sentence
Scientists used iridium to date the geological layer associated with the mass extinction event.
More words in ranks 16,501–16,600
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