thiamin (n.)youdaoicibaDictYouDict[thiamin 词源字典]
also thiamine, alternative name for vitamin B1, 1937, coined by U.S. chemist Dr. Robert R. Williams (1886-1965) from thio-, indicating the presence of sulfur, comb. form of Greek theion "sulfur," + amine, indicating the amino group. Or the second element might be from vitamin.[thiamin etymology, thiamin origin, 英语词源]