octroi
    n 1: a tax on various goods brought into a town

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.
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   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]