[ hα:'məʊnɪəm ]
■ noun a keyboard instrument in which the notes are produced by air driven through metal reeds by foot-operated bellows.
Origin
C19: from Fr., from L. harmonia (see harmony ) or Gk harmonios 'harmonious'.
HARMONIUM
Meaning of HARMONIUM in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004