harmonium       
noun [ C ] uk/hɑːˈməʊ.ni.əm/ us/hɑːrˈmoʊ.ni.əm/
 簧风琴
a musical instrument with a keyboard that makes sounds when metal reeds (= thin pieces) are made to vibrate by air that is forced past them by pressure
  The music is being played on a harmonium instead of a piano. 这段乐曲是用簧风琴演奏的,而不是钢琴。 
 A trio of musicians tap out rhythms on tabla drums and a harmonium. 三位乐手用塔布拉鼓和簧风琴敲出了节奏。 
 Synonym: reed organ
 - More examples
 - A classical singer sat cross-legged, squeezed his ancient harmonium, and composed satirical political ballads on the spot.
 - It's only a lonely-sounding harmonium playing the tune.
 - Singers bellow festive songs accompanied by an amplified harmonium.
 
See also: melodeon