Tonnagium
Defined in 2 dictionaries — Bouvier (1914), Black's (1910)
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
A custom or impost upon wines and other merchandise exported or imported. Cowell.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
In old English law. A custom or impost upon wines and other merchandise exported or imported, according to a certain rate per ton. Spelman; Cowell.