Decisive Oath
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In the civll law. Where one of the parties to a suit, not being able to prove his charge, offered to refer the decision of the cause to the oath of his adversary, which the adversary was hound to accept or tender the same proposui back again, otherwise the whole was taken as confessed by him.
Cod. 4, 1, 12.