Yes, or a bare block. I might also call it a scope since it creates one. ("I created a scope for your variables.")

Furthermore, it is sometimes called "bare loop", since it really is a loop that executes exactly once. redo causes the loop to restart, and next and last exit it. It's only called a bare loop when one of those is used as well.

Update: lidden pointed out that I grouped next with redo when I should have grouped it with last. Fixed.