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Noun: cog railway
  1. Railway for steep mountains; a cogwheel on the locomotive engages cogs on a centre rail to provide traction
    - rack railway

Derived forms: cog railways

Type of: rail, railroad [N. Amer], railroad line [N. Amer], railway [Brit, Cdn], railway line [Brit, Cdn], railway system [Brit, Cdn]

Encyclopedia: Cog railway