Point of rectification
A point on a curve at which the curvature vanishes. At a point of rectification, the deviation of the curve from the tangent line is at least of order three. If at a point of rectification the curve passes through its tangent line from one side to the other, then the point of rectification is a point of inflection.
Point of rectification. A.B. Ivanov (originator), Encyclopedia of Mathematics. URL: http://www.encyclopediaofmath.org/index.php?title=Point_of_rectification&oldid=16332