rayon X
\ʁɛ.jɔ̃ iks\
The verdict
“rayon X” is outside the top-ranked French vocabulary, used as a noun - the kind of word writers most often double-check.
- Unranked
- below top-frequency French
- 7
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Rayonnement électromagnétique à haute fréquence dont la longueur d’onde est comprise entre 5 picomètres et 10 nanomètres, utilisé pour sa grande capacité à traverser la matière et les tissus sans d...
| Property | Value |
|---|---|
| Headword | rayon X |
| Language | French |
| Part of speech | Noun |
| IPA | \ʁɛ.jɔ̃ iks\ |
| Letters | 7 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “rayon X” sits in French frequency
Spelling & Dictionary Insight
The French entry for rayon X is 7 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as \ʁɛ.jɔ̃ iks\. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "Rayonnement électromagnétique à haute fréquence dont la longueur d’onde est comprise entre 5 picomètres et 10 nanomètres, utilisé pour sa grande capacité à traverser la matière et les tissus sans d...".
We couldn't generate a plausible misspelling set for rayon X, and the word's spelling is regular enough that our generator found nothing worth flagging. No close-neighbour confusable shows up for this headword in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.
Our source data has no etymology on file for this entry, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct French form is rayon X, spelled R-A-Y-O-N- -X.
Definition
- 1Rayonnement électromagnétique à haute fréquence dont la longueur d’onde est comprise entre 5 picomètres et 10 nanomètres, utilisé pour sa grande capacité à traverser la matière et les tissus sans dommage utilisé en imagerie médicale et dans les portiques de sécurité ; il est aussi largement utilisé en cristallographie afin d’en décrire la structure des matériaux traversés et en astrophysique pour l’exploration spatiale.
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). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "rayon X"?
What does "rayon X" mean?
How do you pronounce "rayon X"?
What language does "rayon X" come from?
Is PlainSpell free to use?
Using “rayon X”
The practical upshot for anyone who landed here from a spell-check.
- The one correct French spelling is R-A-Y-O-N- -X - every other letter order is a misspelling in standard orthography.
- Say it as \ʁɛ.jɔ̃ iks\ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more French words and confusable pairs in the same reference. French words
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.