Evolute

1.

A.B.C evolute ការកើនឡើងនៃខ្សែបន្ទាត់ A.B.C

1.

It is the locus of the centers of all the circles which are osculatory to the given curve or evolvent.

2.

A curve from which another curve, called the involute or evolvent, is described by the end of a thread gradually wound upon the former, or unwound from it.