: a mineral consisting of a natural alloy of iridium with platinum and other related metals occurring usually in silver-white grains (hardness 6–7, specific gravity, 22.6–22.8)

Word History


platin- + iridium

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Dictionary Entries Near platiniridium

Cite this Entry

“Platiniridium.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2024.

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