NUNCIUS, international law, A messenger, a minister; the pope's legate, commonly called a nuncio. It is used to express that a will or testament. has been made verbally, and not in writing, Vide Testament nuncupative; Will, nuncupative; 1 Williams on Exec. 59; Swinb. Index, h.t.; Ayl. Pand. 359; 1 Bro. Civ. Law, 288; Roberts on Wills, h.t.; 4 Kent, Com. 504; 2 Bouv. Inst. n. 436.