Tachytrope

A curve in which the law of the velocity is given may be called a tachytrope.

first used by Benjamin Peirce,in "A system of Analytic Mechanics", Boston, Little, Brown and Company, 1855.

References

* http://www.math.harvard.edu/history/peirce_mechanics/0392.html
* http://www.math.harvard.edu/history/peirce_mechanics/