Found here:
http://docs.angularjs.org/guide/introduction
It states that "You can use Angular to develop both single-page and round-trip apps, but Angular is designed primarily for developing single-page apps. Angular supports browser history, forward and back buttons, and bookmarking in single-page apps."
But I'm not finding much on the two terms, spelled exactly that way, but I did find this: http://en.wikipedia.org/wiki/Round-trip_engineering
Is this the correct term?