Fcenns nauticum
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Nautical or maritime interest. An extraordinary rate of interest agreed to be paid for the loan of money on the hazard of a voyage; sometimes calied "usura mantma."
Dig. 22, 2; Code, 4, 33; 2 Bl. Comm. 458.
The extraordinary rate of interest, proportioned to the risk, demanded by a person lending money on a ship, or on "bottomry," as it is termed. The agreement for such a rate of interest is also called "fœnu nauticum."' (2 Bl. Comm. 458 ; 2 Steph. Comm. 93 ) Mozley & Whitley.
Fœnus unciarium
Interest of one-twelfth, that is, interest amounting annually to one-twelfth of the principal, hence at the rate of eight and one-third per cent, per annum. This was the highest legal rate of interest in the early times of the Roman republic.
See Mackeld.
Rom. Law, § 382.