Wikipedia
Peritus
Peritus ( Latin for "expert") is the title given to Roman Catholic theologians who are present to give advice at an ecumenical council. At the most recent council, the Second Vatican Council, some periti (the plural form) accompanied individual bishops or groups of bishops from various countries. Others were formally appointed as advisers to the whole Council.
Usage examples of "peritus".
Non solo: il minimo senso logico impediva di pensare che non fossero periti tutti quanti, salva l'eventualità.