Posteriora Derogant Prioribus
Defined in 2 dictionaries — Cyclopedic (1922), Ballentine's (1916)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
Posterior things derogate from things prior. 1 Bouv. Inst, note 90. POSTERIORES (Lat.) This term was used by the Romans to denote the descendants in a direct line beyond the sixth degree. It is still used in making genealogical tables.
Ballentine's Law Dictionary
James A. Ballentine · 1916
Later things derogate from earlier.