AngelusyoudaoicibaDictYouDict[Angelus 词源字典]
"A Roman Catholic devotion commemorating the Incarnation of Jesus and including the Hail Mary, said at morning, noon, and sunset", Mid 17th century: from the Latin phrase Angelus domini 'the angel of the Lord', the opening words of the devotion.[Angelus etymology, Angelus origin, 英语词源]