harmonium

/hɑːˈməʊ̯.niː.əm/

//hɑːˈməʊ̯.niː.əm// noun

By · According to Wiktionary data (CC BY-SA) ·

"harmonium" is a 9-letter English headword indexed on PlainSpell.

The verdict

“harmonium” is an uncommon English word, ranked #75,946 in English word frequency and used as a noun.

#75,946
frequency rank, English
9
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A small keyboard instrument that consists of a series of reed pipes, which sound when one of the keys is pressed to open a valve that allows air to pass through.

Key facts for harmonium
PropertyValue
Headwordharmonium
LanguageEnglish
Part of speechNoun
IPA/hɑːˈməʊ̯.niː.əm/
Letters9
Frequency rank#75,946
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “harmonium” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). harmonium lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for harmonium is 9 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /hɑːˈməʊ̯.niː.əm/. Corpus data places it at rank #75,946 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.

Zero misspellings are on record for harmonium in our index, which points to an orthography that plays by predictable English rules. Our dataset records no confusable match here, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: Borrowed from French harmonium, coined by French harmonium inventor Alexandre Debain in 1840. By surface analysis, harmony + -ium. First attested in 1847. The correct English form is harmonium, spelled H-A-R-M-O-N-I-U-M.

Definition

  1. 1
    A small keyboard instrument that consists of a series of reed pipes, which sound when one of the keys is pressed to open a valve that allows air to pass through.
  2. 2
    Synonym of Hooke's atom.

Etymology

Borrowed from French harmonium, coined by French harmonium inventor Alexandre Debain in 1840. By surface analysis, harmony + -ium. First attested in 1847.

This word in other languages

harmonium(Français)Harmonium(Deutsch)harmônio(Português)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "harmonium"?
"harmonium" is spelled H-A-R-M-O-N-I-U-M. The IPA pronunciation is /hɑːˈməʊ̯.niː.əm/.
What does "harmonium" mean?
As a noun, "harmonium" means: A small keyboard instrument that consists of a series of reed pipes, which sound when one of the keys is pressed to open a valve that allows air to pass through.
How do you pronounce "harmonium"?
The IPA (International Phonetic Alphabet) transcription for "harmonium" is /hɑːˈməʊ̯.niː.əm/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "harmonium"?
Borrowed from French harmonium, coined by French harmonium inventor Alexandre Debain in 1840. By surface analysis, harmony + -ium. First attested in 1847. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “harmonium”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is H-A-R-M-O-N-I-U-M - every other letter order is a misspelling in standard orthography.
  • Say it as /hɑːˈməʊ̯.niː.əm/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list