- (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.
Origin of rack rail
First recorded in 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for rack rail
It was also very apt to get off the rack-rail, and then it stood still.Lives of the Engineers
He obtained a patent, in 1811, for the application of a rack-rail.The Steam Engine Explained and Illustrated (Seventh Edition)
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..