A quantity displayed above the normal line of text (and generally in a smaller point size), as the "" in , is called a superscript. Superscripts are commonly used to indicate raising to a power ( means or cubed), multiple differentiation ( is an abbreviation for ), and a host of other operations and notations in mathematics.
Superscript
See also
SubscriptExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Superscript." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Superscript.html