(in an inclined-plane or mountain-climbing railway) a rail between the running rails having cogs or teeth with which cogwheels on the locomotive engage.
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Origin of rack rail
First recorded in 1830–40
Words nearby rack rail
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for rack rail
The cog-wheel on this latter shaft worked in a rack-rail placed in the centre of the track.Illustrated Catalogue of Locomotives|M. Baird, et. al..
He obtained a patent, in 1811, for the application of a rack-rail.The Steam Engine Explained and Illustrated (Seventh Edition)|Dionysius Lardner