fibrin

/ˈfaɪbɹɪn/

//ˈfaɪbɹɪn// noun

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

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

The verdict

“fibrin” is uncommon English (frequency #74,094 among 18,613 “F” headwords), classed as a noun. The kind of spelling people second-guess.

#74,094
frequency rank, English
18,613
“F” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A white, albuminous, fibrous substance, formed in the coagulation of the blood.

Corpus desk

Index EN-fibrin · fibrin · English

fibrin · rank #74,094 · 0 variants · 0 confusables

  • FREQ-RARE #74,094
  • LEN-LONG 6 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 18,613
  • PHOTO-FINISH Fenian

Nearest frequency peer: Fenian (-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.

Frequency neighbourhood for “fibrin”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “fibrin” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.

Source FrequencyWords open word-frequency list As of May 6, 2026
Key facts for fibrin
PropertyValue
Headwordfibrin
LanguageEnglish
Part of speechNoun
IPA/ˈfaɪbɹɪn/
Letters6
Frequency rank#74,094
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “fibrin” 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). fibrin 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

fibrin is uncommon English at frequency #74,094 among 18,613 “F” headwords, classed as anoun, transcribed /ˈfaɪbɹɪn/. Rarity is why readers land here mid-draft. 3 senses are on record.

The misspelling generator found no plausible variants for fibrin, suggesting the orthography follows predictable English patterns. No confusable counterpart is on file for this word, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From fibre + -in (used to form chemical names of proteins, etc). The correct English form is fibrin, spelled F-I-B-R-I-N.

Definition

  1. 1
    A white, albuminous, fibrous substance, formed in the coagulation of the blood.
  2. 2
    An elastic, insoluble, whitish protein produced by the action of thrombin on fibrinogen and forming an interlacing fibrous network in the coagulation of blood.
  3. 3
    An albuminous body, resembling animal fibrin in composition, found in cereal grains and similar seeds; vegetable fibrin.

Etymology

From fibre + -in (used to form chemical names of proteins, etc).

Synonyms

factor Ia

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

How do you spell "fibrin"?
"fibrin" is spelled F-I-B-R-I-N. The IPA pronunciation is /ˈfaɪbɹɪn/.
What does "fibrin" mean?
As a noun, "fibrin" means: A white, albuminous, fibrous substance, formed in the coagulation of the blood.
How do you pronounce "fibrin"?
The IPA (International Phonetic Alphabet) transcription for "fibrin" is /ˈfaɪbɹɪn/. 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 "fibrin"?
From fibre + -in (used to form chemical names of proteins, etc). 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 "fibrin", not the corpus desk frequency band.

Same letter count

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

Fenian#74,092fitful#74,097exhume#74,084gannet#74,114
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