Cubed
A number taken to the power 3 is said to be cubed, so x^3 is called "x cubed." This terminology derives from the fact that the volume of a cube of edge length x is given by x^3, hence the operation taking a cube's edge length to its volume is known as "cubing" and the quantity x^3 derived from x by cubing is known as "x cubed."
See also
3, Cube Root, Cubic Equation, Cubic Polynomial, SquaredExplore with Wolfram|Alpha
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Cite this as:
Weisstein, Eric W. "Cubed." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Cubed.html