iridium C2 Topic:Materials & Substances US /ɪˈɹɪd.i.əm/ UK /ɪˈɹɪd.i.əm/ See IPA manual Freq #35366 Meanings 1 noun a chemical element (symbol Ir) with an atomic number of 77: a very hard, brittle, silvery-white transition metal of the platinum group. I tried to get him to work on the iridium-osmium problem, but he refused." Thesaurus Word family Derived forms diiridiumeka-iridiumiridarseniteiridateiridianiridiateiridiciridiferousiridio-iridiousiriditeiridium-pointed Related forms iridescenceiridiniridiosmiumiridiseiridizeiris Etymology From international scientific vocabulary, from the New Latin. Topics Materials & Substances External links Cambridge Dictionary Wiktionary Google Images # iridium **Type:** Word **Level:** C2 **Part of speech:** noun **IPA (US):** /ɪˈɹɪd.i.əm/ **IPA (UK):** /ɪˈɹɪd.i.əm/ **Frequency rank:** 35366 ## Meanings 1. a chemical element (symbol Ir) with an atomic number of 77: a very hard, brittle, silvery-white transition metal of the platinum group. ## Examples - I tried to get him to work on the iridium-osmium problem, but he refused." ## Derived Forms - diiridium - eka-iridium - iridarsenite - iridate - iridian - iridiate - iridic - iridiferous - iridio- - iridious - iridite - iridium-pointed ## Related Forms - iridescence - iridin - iridiosmium - iridise - iridize - iris ## Etymology From international scientific vocabulary, from the New Latin. ## Topics - Materials & Substances markdown