|1.||Compare chromatic of, relating to, or based upon any scale of five tones and two semitones produced by playing the white keys of a keyboard instrument, esp the natural major or minor scales forming the basis of the key system in Western music|
|2.||not involving the sharpening or flattening of the notes of the major or minor scale nor the use of such notes as modified by accidentals|
|[C16: from Late Latin diatonicus, from Greek diatonikos, from diatonos extending, from diateinein to stretch out, from |
in music, any stepwise arrangement of the seven "natural" pitches (scale degrees) forming an octave without altering the established pattern of a key or mode-in particular, the major and natural minor scales. Some scales, including pentatonic and whole-tone scales, are not diatonic because they do not include the seven degrees.
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