biotin
/ˈbaɪətɪn/
"biotin" is a 6-letter English headword indexed on PlainSpell.
The verdict
“biotin” is uncommon English (frequency #50,980 among 31,241 “B” headwords), classed as a noun. The kind of spelling people second-guess.
- #50,980
- frequency rank, English
- 31,241
- “B” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A sulfur-containing member of the vitamin B complex, 5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoic acid, found in liver, egg yolk, milk, and yeast, essential to the activit...
Corpus desk
Index EN-biotin · biotin · English
biotin · rank #50,980 · 0 variants · 0 confusables
- FREQ-RARE #50,980
- LEN-LONG 6 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 31,241
- PHOTO-FINISH billowing
Nearest frequency peer: billowing (-1 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.
Frequency neighbourhood for “biotin”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- bhakti
bhakti
49,024 corpus weight
- bigs
bigs
49,023 corpus weight
- billowing
billowing
49,022 corpus weight
- biotin
biotin
49,021 corpus weight
- bip
bip
49,020 corpus weight
- bish
bish
49,019 corpus weight
What this shows Bars show where “biotin” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | biotin |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈbaɪətɪn/ |
| Letters | 6 |
| Frequency rank | #50,980 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “biotin” sits in English frequency
Rare enough to double-check
biotin is uncommon English at frequency #50,980 among 31,241 “B” headwords, classed as anoun, transcribed /ˈbaɪətɪn/. Rarity is why readers land here mid-draft. Gloss: "A sulfur-containing member of the vitamin B complex, 5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoic acid, found in liver, egg yolk, milk, and yeast, essential to the activit...".
biotin has no tracked misspelling variants, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Etymologically, the entry records: Borrowed from German Biotin, from Ancient Greek βίοτος (bíotos, “life”) + the suffix -in. The correct English form is biotin, spelled B-I-O-T-I-N.
Definition
- 1A sulfur-containing member of the vitamin B complex, 5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoic acid, found in liver, egg yolk, milk, and yeast, essential to the activity of multiple enzyme systems.
Etymology
Borrowed from German Biotin, from Ancient Greek βίοτος (bíotos, “life”) + the suffix -in.
Synonyms
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "biotin", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 6 letters (nearest by frequency 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.