Fig. 1 · Cdim on the keyboard

piano chord

Cdim

C1E♭♭3G♭♭5

Two minor thirds stacked. The fifth is diminished, so it cannot be dropped without losing the chord.

on guitar on ukulele the scale

What is true of it

Cdim is C, E♭ and G♭ — 1, b3 and b5 counted from C.

C in other shapes

Cmajor Cmminor Caugaugmented C5power chord Csus2suspended second Csus4suspended fourth

C♯dim D♭dim Ddim D♯dim E♭dim Edim Fdim F♯dim all 374