Definition:Basis (Topology)

Let $$\left({G, +_G: \circ}\right)_R$$ be a unitary $R$-module.

A basis of $$G$$ (plural: "bases") is a linearly independent subset of $$G$$ which is a generator for $$G$$.

Comment
The pronunciation of "bases" in this context is "bay-seez", not "bay-siz".