noun
whole-tone scale
A musical scale where each note is separated by a whole step. Used in classical and jazz contexts.
ドビュッシーは全音音階をよく使った。
Debussy often used the whole-tone scale.
半音階 is a chromatic scale (half steps), while 全音音階 is a whole-tone scale.
Compound of 全音 (whole tone) + 音階 (musical scale).