counter curve

plural counter curves

1. A curve running in the opposite direction to another curve.

   There may also be a counter curve to the left in the lumbar region, but the curve is less severe.

   1990 May-June, Yoga Journal

   1 more example

   It is curious that, in spite of the explanation of the counter curve which was given twenty years ago, in explaining the manner in which Cupid's bow was possible, it is only in quite recent times that skaters have recognised that the small counter curve which follows the rocker and precedes the counter does not indicate an actual change of edge, but is in fact only the necessary result while preserving the line of progression of reversing the direction of the skate.

   1897, Witham T. Maxwell, A System Of Figure-skating: Being The Theory And Practice Of The Art, pages 174-175