Minor (= Latin: smaller) is used in musical terminology to describe a form of scale that corresponds, in its natural form, to the Aeolian mode, the scale on the white notes of the keyboard from A to A. Two other forms of the minor scale are commonly used, the melodic minor and the harmonic minor. The melodic minor scale is a form of minor scale that uses the natural minor form descending, but sharpens the sixth and seventh degrees ascending. The harmonic minor scale uses the natural minor with a sharpened seventh degree ascending and descending.The intervals between the first note or tonic (key note) and the third, sixth and seventh degrees of the natural minor scale are described as minor (that is, C to E flat , a minor third; C to A flat, a minor sixth; C to B flat, a minor seventh). C to D flat forms a minor second. A minor chord or minor triad consists of a bottom note with a note a minor third above, and, optionally, a note a perfect fifth above the bottom note. In this way the chord or triad C - E flat - G is described as minor.