Lewis & Short

transmissĭo, ōnis, f. [transmitto],

  1. I. a sending across, a passing over, passage, Cic. Att. 4, 17, 1: ab eā urbe in Graeciam, id. Phil. 1, 3, 7.
  2. II. The return or payment in of duties, taxes, Cassiod. Var. 2, 24.