harmonium
noun /hɑːˈməʊniəm/
  /hɑːrˈməʊniəm/
 - a musical instrument like a small organ. The player's feet operate the pedals to force air through metal pipes to produce the sound and the different notes are played on the keyboard.簧风琴(键盘乐器,以气流使簧片振动发声) 词源mid 19th cent.: from French, from Latin harmonia ‘joining, concord’ (from Greek, from harmos ‘joint’) or Greek harmonios ‘harmonious’.