iridium
noun /ɪˈrɪdiəm/
/ɪˈrɪdiəm/
[uncountable] (symbol Ir)
- a chemical element. Iridium is a very hard yellow-white metal, used especially in making alloys.
铱 词源early 19th cent.: modern Latin, from Latin iris, irid- ‘rainbow’ (it has this name because it forms compounds of various colours).