Socius
Defined in 3 dictionaries — Cyclopedic (1922), Black's (1910), Kinney (1893)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
In the civil law, a partner.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Lat In the civil law. A partner.
A Law Dictionary and Glossary
George C. Kinney · 1893
I In old English law. An associate; a fellow; a companion in crime; an accomplice; an associate judge or justice.
In the civil law. A partner. Socli mei socins mens socins non est: the partner of my partner is not my partner.