diatonic

/ˌˈdaɪəˌtɑnɪk/

Other forms: diatonically

Definitions of diatonic

1. adjective

   based on or using the five tones and two semitones of the major or minor scales of western music
   synonyms:

   tonal

   having tonality; i.e. tones and chords organized in relation to one tone such as a keynote or tonic
2. adjective

   based on the standard major or minor scales consisting of 5 tones and 2 semitones without modulation by accidentals
   antonyms:

   chromatic

   based on a scale consisting of 12 semitones