hafnium (n.)youdaoicibaDictYouDict[hafnium 词源字典]
rare element, 1923, Modern Latin, from Hafnia, Medieval Latin form of Danish Havn "harbor," the usual pre-1400 name of Copenhagen, Denmark, where the element was discovered by physicist Dirk Coster (1889-1950) and chemist George de Hevesy (1885-1966).[hafnium etymology, hafnium origin, 英语词源]