Exponent

A number, letter, or any quantity written on the right hand of and above another quantity, and denoting how many times the latter is repeated as a factor to produce the power indicated

One who, or that which, stands as an index or representative; as, the leader of a party is the exponent of its principles.

A number that indicates how many times to multiply a base by itself

a mathematical notation indicating the number of times a quantity is multiplied by itself