Gravity railway

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a railway, in a hilly country, on which the cars run by gravity down gentle slopes for long distances after having been hauled up steep inclines to an elevated point by stationary engines.

See also: Railroad

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Indeed the locos enabled the transformation of the railway from a horse and gravity railway into an enterprise that attracted railway engineers from around the world.