iridium (n.)youdaoicibaDictYouDict[iridium 词源字典]
1804, Modern Latin, coined by its discoverer, English chemist Smithson Tennant (1761-1815) from Greek iris (genitive iridos) "rainbow;" so called for "the striking variety of colours which it gives while dissolving in marine acid" [Tennant][iridium etymology, iridium origin, 英语词源]