hodograph

== English == === Etymology === From hodo- +‎ -graph. === Noun === hodograph (plural hodographs) (physics, mathematics) A curve described by the moving extremity of a line whose other end 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. ==== Derived terms ==== ==== Translations ====