形容詞 diatonic:

1. based on the standard major or minor scales consisting of 5 tones and 2 semitones without modulation by accidentals
2. based on or using the five tones and two semitones of the major or minor scales of Western music

di.a.ton.ic

adj.Music （形容詞）【音樂】
Of or using only the eight tones of a standard major or minor scale without chromatic deviations.
全音階的：與使用的八個(gè)音構(gòu)成一個(gè)無變化音八度的標(biāo)準(zhǔn)大調(diào)或小調(diào)音階有關(guān)的

來源：
Late Latin diatonicus
后期拉丁語 diatonicus
from Greek diatonikos
源自 希臘語 diatonikos
dia- [dia-]
dia- [前綴，表.完全的，有始有終的.]
tonos [tone] * see tone
tonos [音調(diào)] *參見 tone

【引伸】
di.aton.ically
adv.（副詞）
di.aton.icism