subpower

A minor power; Something that has control over a limited domain that falls within the larger domain of a greater power.

(mathematics) A type of function such that for every exponent a, there is a small integer ε such that for any positive value x less than ε, its image lies between xᵃ and x⁻ᵃ .

(mathematics) A natural number x, with the property that x = bⁱy for some y that is not multiple of b.