Black's Law Dictionary (2nd edition)dictionaries

Coustoumier

(otherwise spelled “Uoustumicr” or “Coutumier.”) In old French law. A collection of customs, un-written laws, and forms of procedure. Two such volumes are of especial importance in juridical history, viz., the (Jrand CouStumicr de Normandie, aud the Coutumier de France or Grand Coutumier

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