Fibonacci

\fi.bo.nat.ʃi\

/\fi.bo.nat.ʃi\/ name

The verdict

“Fibonacci” is uncommon French (frequency #63,751 among 3,276 “F” headwords), classed as a proper noun. The kind of spelling people second-guess.

#63,751
frequency rank, French
3,276
“F” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Nom de famille italien.

Corpus desk

Index FR-fibonacci · Fibonacci · French

Fibonacci · rank #63,751 · 0 variants · 0 confusables

  • FREQ-RARE #63,751
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,276
  • PHOTO-FINISH festins

Nearest frequency peer: festins (-1 rank slots)

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.

Rangs de longue queue près de « Fibonacci »

Bande clairsemée: les barres inversent le rang pour que le rare se lise plus court

corpus weight

What this shows Vue de longue queue: où « Fibonacci » se situe face à des rangs français aussi rares.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for Fibonacci
PropertyValue
HeadwordFibonacci
LanguageFrench
Part of speechProper noun
IPA\fi.bo.nat.ʃi\
Letters9
Frequency rank#63,751
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Longue queue: rang de « Fibonacci » en français

Cette échelle va du noyau du français courant (gauche) jusqu'à la traîne des formes rares (droite).Fibonaccitombe dans cette queue de rareté:

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

L'échelle est logarithmique (chaque tic ≈ 10× plus rare). Voisins rares de la même bande: « festins » (#63,750), « fibreux » (#63,752), « fesch » (#63,749). Parmi 3,276 lemmes en « F », « Fibonacci » est au #63,751. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

Fibonacci is uncommon French at frequency #63,751 among 3,276 “F” headwords, classed as aproper noun, transcribed \fi.bo.nat.ʃi\. Rarity is why readers land here mid-draft. Gloss: "Nom de famille italien.".

We couldn't generate a plausible misspelling set for Fibonacci, since its letter sequence doesn't invite the usual edit-distance slips. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Wiktionary doesn't record an etymology for this headword, so its spelling is best read as a straightforward mapping from sound to letter. The correct French form is Fibonacci, spelled F-I-B-O-N-A-C-C-I.

Definition

  1. 1
    Nom de famille italien.

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 French corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "Fibonacci"?
"Fibonacci" is spelled F-I-B-O-N-A-C-C-I. The IPA pronunciation is \fi.bo.nat.ʃi\.
What does "Fibonacci" mean?
As a proper noun, "Fibonacci" means: Nom de famille italien.
How do you pronounce "Fibonacci"?
The IPA (International Phonetic Alphabet) transcription for "Fibonacci" is \fi.bo.nat.ʃi\. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "Fibonacci" come from?
"Fibonacci" is a French word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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 French words by spelling shape

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

Same letter count

Frequency-ranked French headwords with 9 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list