imprimatur (n.)youdaoicibaDictYouDict[imprimatur 词源字典]
1640, Modern Latin, literally "let it be printed," the formula of a book licenser, third person singular present subjunctive passive of Latin imprimere "to print" (see impress). Originally of state license to print books, later only of Roman Catholic Church.[imprimatur etymology, imprimatur origin, 英语词源]