I’ve always thought of Norwegian Mittens as the traditional, stranded-colorwork mittens with a pointy tip, featuring an image on the back of the hand and a simple repeating pattern on the palm. I wanted to make sure I actually knew what I was talking about, though before I posted. Unfortunately, Wikipedia doesn’t have a page devoted to Norwegian mittens, so you’ll all have to wait a bit before I can get some more information.
In the meantime, I’ve scoured Ravelry for the most beautiful examples of these mittens. (If you don’t have a Ravelry account, you might not be able to access the links. But – why don’t you?? Sign up! It’s awesome!)