反線 [－线]

Jyutping faan2 sin3
Pinyin fǎn xiàn

Definitions (粵典–words.hk)
  1. 名詞、術語
    粵曲​用語​，​即​係​西​樂​嘅​G​大調​；​同正線​相對
    G major in Cantonese Opera; literally: opposite line