exotoxin
"exotoxin" is a 8-letter English headword indexed on PlainSpell.
The verdict
“exotoxin” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 8
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Any toxin secreted by a microorganism into the surrounding environment.
| Property | Value |
|---|---|
| Headword | exotoxin |
| Language | English |
| Part of speech | Noun |
| Letters | 8 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “exotoxin” sits in English frequency
Rare enough to double-check
exotoxin is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Any toxin secreted by a microorganism into the surrounding environment.".
No misspelling variants are generated for exotoxin in our index, typically a sign the spelling maps closely to how the word sounds. 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: From exo- + toxin. The correct English form is exotoxin, spelled E-X-O-T-O-X-I-N.
Definition
- 1Any toxin secreted by a microorganism into the surrounding environment.
Etymology
From exo- + toxin.
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). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “exotoxin”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is E-X-O-T-O-X-I-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.