From Longman Dictionary of Contemporary Englishnuncionun‧ci‧o /ˈnʌnsiəʊ $ -sioʊ/ noun (plural nuncios) [countable] RRCa representative of the Pope in a foreign country
Examples from the Corpus
nuncio• Eck, however, made his way to Rome and got himself appointed papal nuncio.Origin nuncio (1500-1600) Early Italian, from Latin nuntius “messenger” 