portōrĭum (dat. plur. PORTORIEIS, Plebisc. Thermens ap. Orell. 3673), ĭi, n. [root por, whence porto, portitor, portus, that belongs to carrying or conveying; hence],
I A tax , toll , duty , impost paid on goods imported or exported: portorium dare, Lucil. ap. Non. 37, 20; Cic. Verr. 2, 2, 72, § 176; 2, 2, 75, § 185; id. Font. 5, 19; id. Pis. 36, 87; Caes. B. G. 1, 18; 3, 1; Liv. 39, 24; Plaut. Trin. 4, 4, 15; Caecil. ap. Gell. 15, 14, 5; Dig. 19, 2, 60 fin. ; cf.: ego pol istum portitorem privabo portorio, Plaut. As. 1, 3, 7: portorium circumvectionis, a tax paid for the right of hawking goods about the country , a peddler's tax , Cic. Att. 2, 16, 4.— *
II Fare , freight , = naulum: Charon expetens portorium, Ap. Met. 6, 18, 16.