There is not, but I'll add it to the list of things-to-do!
This is one year old. Any progress? The pitch diagrams are too intrusive in the dictionary (they are too bold) and almost obliterate the underlying text for an old geezer like me, whose reading glasses are like the bottom of 1950s coke bottles. Thanks.
There is! I added it some time back, but neglected to update this thread.
If you pop open the menu and tap the settings icon, you can search for "pitch" in the search box. You should see two checkboxes: one for quizzes, one for the dictionary :)