アニュス・デイアニュスデイMeanings1expressionAgnus DeiLatin liturgical phrase meaning 'Lamb of God', used in Christian contexts. In Japanese, it appears in discussions of Christian liturgy, music, or art.from Latinミサの中なかで「アニュス・デイ」が歌うたわれた。The 'Agnus Dei' was sung during the Mass.