ruling grade
noun Railroads.
the steepest grade on a given stretch of track, which determines the maximum tonnage that can be hauled in a train having a given horsepower at a stated minimum speed.
Nearby words
rules, rules committee, rules of order, ruling, ruling elder, ruling grade, ruly, rum, rum rebellion, rum shop, rum-dum
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019