auxin
"auxin" is a 5-letter English headword indexed on PlainSpell.
The verdict
“auxin” is uncommon English (frequency #76,550 among 3,931 “A” headwords), classed as a noun. The kind of spelling people second-guess.
- #76,550
- frequency rank, English
- 3,931
- “A” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 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.
Corpus desk
Index EN-auxin · auxin · English
auxin · rank #76,550 · 0 variants · 0 confusables
- FREQ-RARE #76,550
- LEN-MID 5 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 3,931
- PHOTO-FINISH Avoca
Nearest frequency peer: Avoca (+2 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Long-tail ranks near “auxin”
Sparse band: bars invert rank so rarer forms read shorter
- assignee
assignee
23,456 corpus weight
- auxin
auxin
23,451 corpus weight
- Avoca
Avoca
23,449 corpus weight
- Baar
Baar
23,448 corpus weight
- backspace
backspace
23,446 corpus weight
- bacteriopha…
bacteriophage
23,445 corpus weight
What this shows Long-tail view: where “auxin” sits against similarly uncommon English ranks.
| 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) |
Long-tail rank of “auxin” in English
Rare enough to double-check
auxin is uncommon English at frequency #76,550 among 3,931 “A” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "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.
Recorded use
Wiktionary examplesThese source excerpts show how auxin appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
In Arabidopsis roots, cold stress may reduce shootward auxin transport and alter the intracellular auxin gradient.
SE onset depends on a complex network of interactions among plant growth regulators, mainly auxins and cytokinins, during the proembryogenic early stages, and ethylene and gibberellic and abscisic acids later in the development of somatic embryos.
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "auxin", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 5 letters (nearest by frequency rank).