Dbm7b5 chord for piano with keyboard diagram.
Explanation: The D flat minor seventh flat five is also called D flat half-diminished (also written as Dbø). The chord is abbreviated Dbm7b5, Dbm7(b5) or Dbm7-b5.
Theory: The Dbm7b5 is a D flat minor seventh with a lowered fifth.
Notes: Db - E - G - B