Riga
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
In old European law. A species of service and tribute rendered to their lords by agricultural tenants. Supposed by Spelman to be derived from 'the name of a certain portion of land called, in England, a "rig" or "ridge," an elevated piece of ground, formed out of several furrows.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
In old European law. A species of servico and tribute rendered to their lords by agricultural tenants. Supposed by Spelman to be derived from the name of a certain portion of land, called, in England, a "rig" or "ridge," an elevated piece of ground, formed out of several furrows. Burrill.