césium
\se.zjɔm\
The verdict
“césium” is uncommon French (frequency #59,208 among 8,609 “C” headwords), classed as a noun. The kind of spelling people second-guess.
- #59,208
- frequency rank, French
- 8,609
- “C” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Élément chimique de numéro atomique 55 et de symbole Cs qui fait partie de la série chimique des métaux alcalins.
Corpus desk
Index FR-cesium · césium · French
césium · rank #59,208 · 0 variants · 0 confusables
- FREQ-RARE #59,208
- LEN-LONG 6 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 8,609
- PHOTO-FINISH côtelettes
Nearest frequency peer: côtelettes (+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 « césium »
Bande clairsemée: les barres inversent le rang pour que le rare se lise plus court
- cuillerées
cuillerées
40,797 corpus weight
- culbute
culbute
40,796 corpus weight
- cupides
cupides
40,795 corpus weight
- césium
césium
40,793 corpus weight
- côtelettes
côtelettes
40,792 corpus weight
- DCE
DCE
40,790 corpus weight
What this shows Vue de longue queue: où « césium » se situe face à des rangs français aussi rares.
| Property | Value |
|---|---|
| Headword | césium |
| Language | French |
| Part of speech | Noun |
| IPA | \se.zjɔm\ |
| Letters | 6 |
| Frequency rank | #59,208 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Longue queue: rang de « césium » en français
Rare enough to double-check
césium is uncommon French at frequency #59,208 among 8,609 “C” headwords, classed as anoun, transcribed \se.zjɔm\. Rarity is why readers land here mid-draft. 2 senses are on record.
No generated misspelling entries exist for césium in our index, a straightforward case of a spelling with little room for common typos. It is not paired with a close-neighbour confusable in our dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.
No documented word history exists for this headword, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct French form is césium, spelled C-É-S-I-U-M.
Definition
- 1Élément chimique de numéro atomique 55 et de symbole Cs qui fait partie de la série chimique des métaux alcalins.
- 2Corps simple de cet élément, alcalin argent-doré.
Recorded use
Wiktionary examplesThese source excerpts show how césium appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Le césium, Cs, de numéro atomique 55, est le 45ᵉ élément le plus abondant de la croûte terrestre, en moyenne 2,6 g par tonne métrique, (3 g dans l'écorce terrestre, 3 à 5 10⁻⁴g dans l’eau de mer). Il existe de manière dispersé dans les roches, les sols et les argiles.
Parmi les alcalins, il apparaît que le césium est l'élément le plus favorable pour la fabrication d’une horloge atomique.
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 French corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Similar French words by spelling shape
Same letter count and similar misspelling depth for "césium", not the corpus desk frequency band.
Same letter count
Frequency-ranked French headwords with 6 letters (nearest by frequency rank).