hodograph Meaning, Definition & Usage

Hod"o*graph noun
Etymology
Gr. path + graph.
Definitions
  1. (Math.) A curve described by the moving extremity of a line the other end of which is fixed, this line being constantly parallel to the direction of motion of, and having its length constantly proportional to the velocity of, a point moving in any path; -used in investigations respecting central forces.

Webster 1913