Slash chords

A slash chord is a chord notation that specify a bass note after a forward slash, such as C/B, which is a C major triad, with a B in the bass. The slash chord notation can be used to express inversions of triads: C major consist of the tones C E G. The inversions can be expressed like C/E, and C/G.

Forward slashes are also commonly used in notation of minor sixth add ninth chords (Cm6/9), and sixth add ninth chords (C6/9). But these chords are not counted as slash chords.