Harmonium definition

här-mōnē-əm
An organlike keyboard instrument that produces tones with free metal reeds actuated by air forced from a bellows.
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A small kind of reed organ.
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(music) 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.
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Other Word Forms

Noun

Singular:
harmonium
Plural:
harmoniums

Origin of harmonium

  • French from harmonie harmony from Old French armonie, harmonie harmony

    From American Heritage Dictionary of the English Language, 5th Edition

  • From French harmonium, a term coined by Alexandre Debain.

    From Wiktionary