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Noun: tonne-kilometer
Usage: US (elsewhere: tonne-kilometre)
  1. A unit of measure used in freight transport which determines the transport of one tonne of goods by a transport mode over one kilometer.
    "A transport of 1250 kilograms over 90 kilometers equals 112,5 tonne-kilometers.";
    - tonne-kilometre [Brit, Cdn], tkm

Type of: unit, unit of measurement

Encyclopedia: Tonne-kilometer