A way to refer to a set as a whole

I am not a specialist in databases, and I only need to clarify a terminological question that I have. Assume we have a table containing the field F. F gets its values from the set S, a collection of values of a certain type. (Let's imagine that the elements of S are characters.) Is there a common way to refer to S as a whole? Something like the **alphabet of F** or the **inventory of F**.