|a.||1.||(Mus.) Pertaining to the scale of eight tones, the eighth of which is the octave of the first.|
|Adj.||1.||diatonic - based on the standard major or minor scales consisting of 5 tones and 2 semitones without modulation by accidentals|
chromatic - based on a scale consisting of 12 semitones; "a chromatic scale"
|2.||diatonic - based on or using the five tones and two semitones of the major or minor scales of Western music|