effusion
"effusion" is a 8-letter English headword indexed on PlainSpell.
The verdict
“effusion” is an uncommon English word, ranked #58,656 in English word frequency and used as a noun.
- #58,656
- frequency rank, English
- 8
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A liquid outpouring.
| Property | Value |
|---|---|
| Headword | effusion |
| Language | English |
| Part of speech | Noun |
| Letters | 8 |
| Frequency rank | #58,656 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “effusion” sits in English frequency
Spelling & Dictionary Insight
The English entry for effusion is 8 letters long, classified as a noun. Corpus data places it at rank #58,656 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
effusion doesn't appear in our generated misspelling index, and the word's spelling is regular enough that our generator found nothing worth flagging. Our confusable-pair dataset has no match for it, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Etymologically, the entry records: Borrowed from Middle French effusion, from Latin effūsiō (“outpouring”). Displaced native Old English āgotennes. The correct English form is effusion, spelled E-F-F-U-S-I-O-N.
Definition
- 1A liquid outpouring.
- 2Process of gases passing through a hole or holes considerably smaller than the mean free path of the gas molecules.
- 3An outpouring of speech or emotion.
- 4The seeping of fluid into a body cavity; the fluid itself.
Etymology
Borrowed from Middle French effusion, from Latin effūsiō (“outpouring”). Displaced native Old English āgotennes.
This word in other languages
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 "effusion"?
What does "effusion" mean?
What is the origin of the word "effusion"?
Is PlainSpell free to use?
Using “effusion”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is E-F-F-U-S-I-O-N - every other letter order is a misspelling in standard orthography.
- 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.