Caesium

[ˈt͡sɛːzi̯ʊm]

/[ˈt͡sɛːzi̯ʊm]/ noun

The verdict

“Caesium” is uncommon German (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency German
7
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - chemisches Element mit der Ordnungszahl 55, das zur Gruppe der Alkalimetalle gehört

Corpus desk

Index DE-caesium · Caesium · German

Caesium · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 7 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "C" thin
  • PHOTO-UNK Peer pending

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.

Key facts for Caesium
PropertyValue
HeadwordCaesium
LanguageGerman
Part of speechNoun
IPA[ˈt͡sɛːzi̯ʊm]
Letters7
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Langschwanz-Rang von „Caesium“ im Deutschen

Caesiumliegt außerhalb der 100.000 häufigsten deutschen Wörter, im Langschwanz technischer, archaischer oder seltener Formen, genau dort, wo Schreibzweifeln zuschlagen.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

Caesium is uncommon German outside the top frequency list, classed as anoun, transcribed [ˈt͡sɛːzi̯ʊm]. Rarity is why readers land here mid-draft. Gloss: "chemisches Element mit der Ordnungszahl 55, das zur Gruppe der Alkalimetalle gehört".

We couldn't generate a plausible misspelling set for Caesium, suggesting the orthography follows predictable German patterns. Our dataset records no confusable match here, which tends to mean the word is visually distinctive enough to stand on its own.

This entry carries no recorded etymology, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct German form is Caesium, spelled C-A-E-S-I-U-M.

Definition

  1. 1
    chemisches Element mit der Ordnungszahl 55, das zur Gruppe der Alkalimetalle gehört

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 "Caesium"?
"Caesium" is spelled C-A-E-S-I-U-M. The IPA pronunciation is [ˈt͡sɛːzi̯ʊm].
What does "Caesium" mean?
As a noun, "Caesium" means: chemisches Element mit der Ordnungszahl 55, das zur Gruppe der Alkalimetalle gehört
How do you pronounce "Caesium"?
The IPA (International Phonetic Alphabet) transcription for "Caesium" is [ˈt͡sɛːzi̯ʊm]. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "Caesium" come from?
"Caesium" is a German 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.

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

Source: FrequencyWords open word-frequency list