User blog comment:TheFanMaster/Evolution Center/@comment-1713909-20141223131941

Definition of "Evolute";

''In the differential geometry of curves, the evolute of a curve is the locus of all its centers of curvature. That is to say that when the center of curvature of each point on a curve is drawn, the resultant shape will be the evolute of that curve. The evolute of a circle is therefore a single point at its center.''