C diminished piano chord - Cdim
The C diminished chord is a 3-note chord consisting of the notes C, Eb and Gb.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Cdim.
Interactive piano diagram for the C diminished chord
C diminished piano chord chart image
In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows
the notes for the the Cdim chord. Feel free to save or share the image as needed.