The C diminished chord is a three-note chord consisting of the notes C, E♭, and G♭. It is formed by stacking two minor thirds on top of each other, creating a tense and unstable sound. This chord is often used in music to create a sense of suspense or to lead into another chord. In music theory, diminished chords are typically represented with the symbol "°" or "dim." The C diminished chord can be found in various musical genres, including classical, jazz, and pop. It often functions as a transitional chord, helping to connect other chords in a progression.