We refer to them as decals for single piece prints, and murals as multi-panel prints for wall coverings larger that 89" X 60". I hope this helps!

are the "decals" like wallpaper as well

In that it applies directly to a wall without pushpins, yes. The 'decals' are printed on a thin fabric that has a self adhesive backing. You peel the backing off and it's ready to apply directly to the wall. I hope this helps!