endotoxin

noun

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

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

The verdict

“endotoxin” is uncommon English (frequency #95,938 among 18,836 “E” headwords), classed as a noun. The kind of spelling people second-guess.

#95,938
frequency rank, English
18,836
“E” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Any toxin secreted by a microorganism and released into the surrounding environment only when it dies.

Key facts for endotoxin
PropertyValue
Headwordendotoxin
LanguageEnglish
Part of speechNoun
Letters9
Frequency rank#95,938
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “endotoxin” 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). endotoxin lands here:

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

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

Rare enough to double-check

endotoxin is uncommon English at frequency #95,938 among 18,836 “E” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Any toxin secreted by a microorganism and released into the surrounding environment only when it dies.".

No generated misspelling entries exist for endotoxin in our index, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From endo- + toxin. The correct English form is endotoxin, spelled E-N-D-O-T-O-X-I-N.

Definition

  1. 1
    Any toxin secreted by a microorganism and released into the surrounding environment only when it dies.

Etymology

From endo- + toxin.

This word in other languages

endotoxine(Français)

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 "endotoxin"?
"endotoxin" is spelled E-N-D-O-T-O-X-I-N.
What does "endotoxin" mean?
As a noun, "endotoxin" means: Any toxin secreted by a microorganism and released into the surrounding environment only when it dies.
What is the origin of the word "endotoxin"?
From endo- + toxin. 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 “endotoxin”

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

  • The one correct English spelling is E-N-D-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

Other uncommon English words near this rank

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