Fossatorum Operatio
A New Law Dictionary and Glossary · Alexander M. Burrill · 1850
A New Law Dictionary and Glossary
Lat.
In old English law
Fosse-work; or the service of laboring, done by inhabitants and adjoining tenants, for the repair and maintenance of the ditches round a city or town, for which some paid a contribution, called fossagium.
Cowell. Kennett's Glossary, cited t6»i.