Playing, Part 2 · Chapter 12: More Chords and Inversions
Minor Seventh (With Flatted Fifth) Chords and Inversions
If we flat the 5th of the minor 7th chord, we get another useful chord, which is called… you guessed it… a minor 7♭5 chord:

Note the new diminished 5th interval description on the previous page. When we take a perfect interval (such as a 5th) and reduce it by a half step, we get a diminished interval.
The “minor 7th ♭5” chord is also referred to as a half diminished or half diminished 7th chord.
We can invert the C minor 7th ♭5 chord, as follows:
