hodograph
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English
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/Angular_velocity_hodograph.png/220px-Angular_velocity_hodograph.png)
Etymology
[edit]Noun
[edit]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.