Harmonium

ahd-5
  • noun. An organlike keyboard instrument that produces tones with free metal reeds actuated by air forced from a bellows.
  • The Century Dictionary and Cyclopedia
  • noun. One of the forms of the reed-organ (which see).
  • the GNU version of the Collaborative International Dictionary of English
  • noun. A musical instrument, resembling a small organ and especially designed for church music, in which the tones are produced by forcing air by means of a bellows so as to cause the vibration of free metallic reeds. It is now made with one or two keyboards, and has pedals and stops.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. A small keyboard instrument consisting of a series of reed pipes which sound when air is allowed to pass through them by means of a valve that opens when a key is depressed.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • noun. a free-reed instrument in which air is forced through the reeds by bellows