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iridium

Related topics: Elements
i·rid·i·um /ɪˈrɪdiəm/ noun [uncountableU]  
HCEMHa hard and very heavy metal that is combined with platinum to make jewellery and is used in scientific instruments. It is a chemical element: symbol Ir 铱〔一种化学元素,符号为 Ir
Examples from the Corpus
Origin iridium
(1800-1900) Latin iris ( → IRIS); because when it becomes liquid in a particular acid, it shows the colors of the rainbow
i·rid·i·um noun
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