niacin

/ˈnaɪəsɪn/

//ˈnaɪəsɪn// noun

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

"niacin" is a 6-letter English headword indexed on PlainSpell.

The verdict

“niacin” is uncommon English (frequency #52,519 among 1,534 “N” headwords), classed as a noun. The kind of spelling people second-guess.

#52,519
frequency rank, English
1,534
“N” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A water-soluble vitamin, a component of vitamin B complex, found in meat, yeast, and dairy products; it is essential to metabolism.

Corpus desk

Index EN-niacin · niacin · English

niacin · rank #52,519 · 0 variants · 0 confusables

  • FREQ-RARE #52,519
  • LEN-LONG 6 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 1,534
  • PHOTO-FINISH Nickerson

Nearest frequency peer: Nickerson (+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.

Long-tail ranks near “niacin”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “niacin” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for niacin
PropertyValue
Headwordniacin
LanguageEnglish
Part of speechNoun
IPA/ˈnaɪəsɪn/
Letters6
Frequency rank#52,519
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “niacin” in English

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).niacinfalls in this rarity band:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “Nickerson” (#52,520), “nigra” (#52,521), “NEPA” (#52,516). Among 1,534 “N” headwords, “niacin” is #52,519. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

niacin is uncommon English at frequency #52,519 among 1,534 “N” headwords, classed as anoun, transcribed /ˈnaɪəsɪn/. Rarity is why readers land here mid-draft. Gloss: "A water-soluble vitamin, a component of vitamin B complex, found in meat, yeast, and dairy products; it is essential to metabolism.".

Our edit-distance generator produced no likely misspellings for niacin, which points to an orthography that plays by predictable English rules. No close-neighbour confusable shows up for this headword in our dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: in 1942 derived from nicotinic + acid + vitamin, chosen to dissociate it from nicotine, to avoid the perception that vitamins or niacin-rich food contains nicotine, or that cigarettes contain vitamins. The correct English form is niacin, spelled N-I-A-C-I-N.

Definition

  1. 1
    A water-soluble vitamin, a component of vitamin B complex, found in meat, yeast, and dairy products; it is essential to metabolism.

Recorded use

Wiktionary example

These source excerpts show how niacin appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Mixing the alkali into the recipe in the right way chemically releases the otherwise unavailable niacin in the corn, which stops pellagra in its tracks, and allowed corn-based agricultural populations to grow and spread.

Etymology

in 1942 derived from nicotinic + acid + vitamin, chosen to dissociate it from nicotine, to avoid the perception that vitamins or niacin-rich food contains nicotine, or that cigarettes contain vitamins.

Synonyms

E375 when used as a colour retention agentnicotinic acidvitamin B3vitamin PPvitamin P-PPP-factorpellagra-preventive factor

This word in other languages

niacine(Français)Niacin(Deutsch)

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 "niacin"?
"niacin" is spelled N-I-A-C-I-N. The IPA pronunciation is /ˈnaɪəsɪn/.
What does "niacin" mean?
As a noun, "niacin" means: A water-soluble vitamin, a component of vitamin B complex, found in meat, yeast, and dairy products; it is essential to metabolism.
How do you pronounce "niacin"?
The IPA (International Phonetic Alphabet) transcription for "niacin" is /ˈnaɪəsɪn/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "niacin"?
in 1942 derived from nicotinic + acid + vitamin, chosen to dissociate it from nicotine, to avoid the perception that vitamins or niacin-rich food contains nicotine, or that cigarettes contain vitamins. 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "niacin", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 6 letters (nearest by frequency rank).

neocon#52,514myelin#52,512nought#52,527omnium#52,534

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list