Triumvir
Defined in 2 dictionaries — Cyclopedic (1922), Black's (1910)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
A trithing man or constable of three hundred. Cowell. TRIUMVIRI (or TREVIRI, or TRESVIRI) capitales (Lat.)
In Roman law. Officers who had charge of the prison, through whose intervention punishments were inflicted. Sallust, in Catilin. They had eight lictors to execute their orders. Vicat.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Lat In old English law. A trithing man or constable of three hundred. Cowell.