auxin
"auxin" is a 5-letter English headword indexed on PlainSpell.
The verdict
“auxin” is an uncommon English word, ranked #76,550 in English word frequency and used as a noun.
- #76,550
- frequency rank, English
- 5
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A class of plant growth substance (often called phytohormones or plant hormones) which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.
| Property | Value |
|---|---|
| Headword | auxin |
| Language | English |
| Part of speech | Noun |
| Letters | 5 |
| Frequency rank | #76,550 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “auxin” sits in English frequency
Spelling & Dictionary Insight
The English entry for auxin is 5 letters long, classified as a noun. Corpus data places it at rank #76,550 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "A class of plant growth substance (often called phytohormones or plant hormones) which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.".
Zero misspellings are on record for auxin in our index, since its letter pattern doesn't lend itself to common typo substitutions. No close-neighbour confusable shows up for this headword in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: From Ancient Greek αὐξάνω (auxánō, “to grow”) + -in. The correct English form is auxin, spelled A-U-X-I-N.
Definition
- 1A class of plant growth substance (often called phytohormones or plant hormones) which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.
Etymology
From Ancient Greek αὐξάνω (auxánō, “to grow”) + -in.
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
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Using “auxin”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is A-U-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.