Well, the reformed orthography has its pros and cons. It contains quite a few silly changes, but also some simplifications that make a lot of sense, the new rules about
ß and
ss being a case in point.
But back to our
Handwörterbuch: I just saw that it's also on the
Duden website, with the definition I quoted above, and illustrated with this cute photo:

Now this picture most certainly doesn't depict a
Hand-, but at best a
Taschenwörterbuch...
Very funny.