reverse curve

noun

an S-shaped curve, as on highways and railroad tracks, produced by the joining of two curves that turn in opposite directions.

Words Nearby reverse curve

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

The tunnel itself includes a reverse curve, and, at the present time, railroad tracks and Stock Creek waters run through it.
Hallowed Heritage: The Life of Virginia | Dorothy M. Torpey
It is here shown combined with the second volute in the form of a reverse curve.
Industrial Arts Design | William H. Varnum
At 100 feet a reverse curve brought the cavern on a course parallel to that which it had held up to 60 feet.
Archeological Investigations | Gerard Fowke

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