'Hodograph' definitions:

Definition of 'Hodograph'

From: GCIDE

Hodograph \Hod"o*graph\, n. [Gr.? path + graph.] (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. [1913 Webster]