octroy

from The Collaborative International Dictionary of English v.0.48

Octroi \Oc`troi"\, n. [F.]
   1. A privilege granted by the sovereign authority, as the
      exclusive right of trade granted to a guild or society; a
      concession.
      [1913 Webster]

   2. A tax levied in money or kind at the gate of a French city
      on articles brought within the walls.
      [1913 Webster] [Written also {octroy}.]
      [1913 Webster]