Héyīn (-)
original: 和音
Literal translation: 和: "harmonious"; 音: "sound / tone"; Chord playing; Defined by Wong as "chords" only.
Wong, Samuel Shengmiao: Qi’ - An instrumental guide to the Chinese orchestra. Singapore, 2005, p.139.
汉英词典 (Hàn Yīng cídiǎn) / A Chinese-English dictionary. 北京 [Běijīng], 1985, p.274 (和 ➁) & 826.