Di·a·ton·ic a. Mus. Pertaining to the scale of eight tones, the eighth of which is the octave of the first.
Diatonic scale Mus., a scale consisting of eight sounds with seven intervals, of which two are semitones and five are whole tones; a modern major or minor scale, as distinguished from the chromatic scale.
adj 1: based on the standard major or minor scales consisting of 5
tones and 2 semitones without modulation by
accidentals [ant: chromatic]
2: based on or using the five tones and two semitones of the
major or minor scales of Western music