Chords m7b5 (Semi-diminished)
min7b5 , m7b5 , Ø
Chords min7b5 They are made up of 4 notes that correspond to grades:
Root - Minor Third - Diminished Fifth - Minor Seventh (R - b3 - b5 - b7)
They are represented by the name of the chord plus the word "m7b5", for example Do min7b5 (Semi-diminished C) is represented as Cm7b5 (CØ)