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
iridium• Like Green's compound, this iridium compound contains two hydrogen atoms that can be eliminated by light.
Originiridium
(1800-1900)Latiniris ( → IRIS); because when it becomes liquid in a particular acid, it shows the colors of the rainbow