The term ‘minor’ refers to the b3rd. This is a C minor chord with a dominant or b7th. If we were to raise the 7th, we would have a C minor chord with a major 7th. Now check Example 5!

Using the notes C, Eb, G and Bb will present you with the chord we describe as C minor 7. It obviously adopts a minor tonality, but the presence of the 7th makes it sound fairly unique ...

Harmonic minor keys are used when writing ... In the jazz styles of Gershwin and Kern, the dominant seventh was often substituted with an augmented chord.This gave the tonic-dominant a new and ...