Explanations
Abbreviations are often used in chord names (alternative chord symbols in parentheses).
C - C major (C△)
Cm - C minor
C7 - C dominant seventh
Cm7 - C minor seventh
Cmaj7 - C major seventh (C△7)
CmM7 - C minor major seventh
C6 - C major sixth
Cm6 - C minor sixth
C6/9 - C sixth/ninth (sixth added ninth)
C5 - C fifth
C9 - C dominant ninth
Cm9 - C minor ninth
Cmaj9 - C major ninth
C11 - C eleventh
Cm11 - C minor eleventh
C13 - C thirteenth
Cm13 - C minor thirteenth
Cmaj13 - C major thirteenth
Cadd - C add
C7-5 - C seven minus five
C7+5 - C seven plus five
Csus - C suspended
Cdim - C diminished (C°)
Cdim7 - C diminished seventh (C°7)
Cm7b5 - C minor seventh flat five (Cø)
Caug - C augmented (C+)
Caug7 - C augmented seventh