Black's Law Dictionary (2nd edition)dictionaries

Ex Mutuo

From or out of loan. In the old law of England, a debt was said to arise ex mutuo when one lent another any-thlng whlch consisted In number, weight, or measure. 1 Reeve, Eng. Law, 159; Bract fol. 99

Source: Black’s Law Dictionary 2nd Ed (1910)