What do you call the User Interface of your product?

What do you call the user interface of your digital product inside your team (in your design language)? or repos belong to them. Is there any standard or let's say best practice for it?

In our case, the product includes various parts, like front-end, back-end, core (C C++), etc.

I'm asking this question since it's a UX issue to take care of it and make the team using same phrases to point to same parts of the project.

Some options I've heard are:

  • Web UI
  • User Interface or UI
  • GUI
  • Console
  • Interface
  • Front-end
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