pentatonic

形容词 pentatonic:

1. relating to a pentatonic scale

pen.ta.ton.ic

adj.Music （形容词）【音乐】
Of or using only five tones, especially the first, second, third, fifth, and sixth tones of a diatonic scale.
五音阶的：只用或包括五个音阶的，尤其指所有音阶中的第一、二、三、五、六音