An "overdot" is a raised dot appearing above a symbol most commonly used in mathematics to indicate a derivative taken with respect to time (e.g., ). The expression is voiced " dot," and was Newton's notation for derivatives (which he called "fluxions").

# Overdot

## See also

Derivative, Dot, Double Dot## Explore with Wolfram|Alpha

## References

Bringhurst, R.*The Elements of Typographic Style, 2nd ed.*Point Roberts, WA: Hartley and Marks, p. 282, 1997.

## Referenced on Wolfram|Alpha

Overdot## Cite this as:

Weisstein, Eric W. "Overdot." From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/Overdot.html