Caput
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
PRINCIPIUM, ET FINIS. The head, beginning, and end. A term applied in English law to the king, as head of parliament.
4 Inst. 3; 1 Bl. Comm. 188.