Dictionary: Am7b5 Chord

Am7b5 is an A diminished triad with a minor 7th (G note).  This chord is compatible with the A Locrian mode.

Am7b5 (Guitar, Intermediate)

Am7b5 is basically the Am7 chord with a diminished 5th:

A string: A (root)
D string: Eb (diminished 5th)
G string: A (octave of root)
B string: C (minor 3rd)
High E string: G (minor 7th)