Umbilicus
Defined in 2 dictionaries — Cyclopedic (1922), Kinney (1893)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
(Lat.) Literally, the navel; the center of any thing. The name given to the fourth and middle part of the Digests, consisting of eight books, from the twentieth to the twenty-seventh, both inclusive.
A Law Dictionary and Glossary
George C. Kinney · 1893
I. The navel; the center of anything. The name given to the fourth and middle part of the Digests.