cyan (n.)youdaoicibaDictYouDict[cyan 词源字典]
1889, short for cyan blue (1879), from Greek kyanos "dark blue, dark blue enamel, lapis lazuli," probably a non-Indo-European word, but perhaps akin to, or from, Hittite *kuwanna(n)- "copper blue."[cyan etymology, cyan origin, 英语词源]