Sacramentum fidelitatis
Defined in 2 dictionaries — Ballentine's (1916), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
Oath of fealty. See Fealty.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
In old English law. The oath of fealty. Reg. Orig. 303.
Defined under Sacramentum in Black's Law Dictionary.