reverse curve

noun

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

Example Sentences

“Usually it happens the day of and it declines, and by a week after nobody’s talking about it. In this case, it had a reverse curve.”

From Washington Post

"You would think that it would have the greatest impact on my life close to the event. But it's like a reverse curve. The further away from it I get, it seems, the more it's impacting me."

From Reuters

Meanwhile, in a separate show at the Gagosian outpost at 522 West 21st Street, the entire space will be given over to a single Brobdingnagian sculpture — “Reverse Curve,” back-to-back plates that form an S-shape and wind, riverlike, for 99 feet.

From New York Times

Passenger train 41 derailed near Venice while running around a reverse curve fifty miles an hour.

From Project Gutenberg

It requires knowing where to start and stop the stroke, how to draw the reverse curve and express the letter's inherent sensuality.

From Seattle Times