imprimatur
Concise Oxford English Dictionary © 2008 Oxford University Press:
imprimatur /ˌɪmprɪˈmeɪtə, -ˈmɑːtə, -ˈmɑːtʊə/
▶noun an official licence issued by the Roman Catholic Church to print an ecclesiastical or religious book.
■ a person's authoritative approval.
– origin C17: from L., ‘let it be printed’.
'imprimatur' also found in these Oxford entries:
