diaphonic

{ , a. [ Gr. dia` through + &unr_; sound, tone. ] Diacoustic. [ 1913 Webster ]

a. [ L. diatonicus, diatonus, Gr. &unr_;, &unr_;, fr. &unr_; to stretch out; dia` through + &unr_; to stretch: cf. F. diatonique. See Tone. ] (Mus.) Pertaining to the scale of eight tones, the eighth of which is the octave of the first. [ 1913 Webster ]

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. [ 1913 Webster ]