general architectural name for angular services?

An Angular 2 service is basically a wrapper class that serves as an interface into a downstream service implementation. This is similar to how a DAL class would be a wrapper class that serves as an interface into a downstream data store. So what kind of general architectural name would you use to describe an Angular service? I described it to someone I was showing it to as "like a DAL" but I'm sure there's a better way to describe it. Would you describe it as a "service proxy", a "service wrapper" or something else?