zirkadian

[t͡sɪʁkaˈdi̯aːn]

/[t͡sɪʁkaˈdi̯aːn]/ adj

The verdict

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

Unranked
below top-frequency German
9
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - bei physiologischen Prozessen einem biologischen Rhythmus von zirka einem Tag entsprechend (Blutdruck, Gehirnaktivität, Hormonproduktion, Körpertemperatur, Puls, Schlaf und Anderes)

Corpus desk

Index DE-zirkadian · zirkadian · German

zirkadian · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "Z" 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 zirkadian
PropertyValue
Headwordzirkadian
LanguageGerman
Part of speechAdjective
IPA[t͡sɪʁkaˈdi̯aːn]
Letters9
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Langschwanz-Rang von „zirkadian“ im Deutschen

zirkadiansitzt jenseits der 100.000 häufigsten deutschen Formen, im Schwanz spezialisierten oder seltenen Wortschatzes.

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

Rare enough to double-check

zirkadian is uncommon German outside the top frequency list, classed as anadjective, transcribed [t͡sɪʁkaˈdi̯aːn]. Rarity is why readers land here mid-draft. Gloss: "bei physiologischen Prozessen einem biologischen Rhythmus von zirka einem Tag entsprechend (Blutdruck, Gehirnaktivität, Hormonproduktion, Körpertemperatur, Puls, Schlaf und Anderes)".

The misspelling generator found no plausible variants for zirkadian, since its letter sequence doesn't invite the usual edit-distance slips. This entry stands alone in our confusable dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

No borrowing history is documented for this entry, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct German form is zirkadian, spelled Z-I-R-K-A-D-I-A-N.

Definition

  1. 1
    bei physiologischen Prozessen einem biologischen Rhythmus von zirka einem Tag entsprechend (Blutdruck, Gehirnaktivität, Hormonproduktion, Körpertemperatur, Puls, Schlaf und Anderes)

Recorded use

Wiktionary examples

These source excerpts show how zirkadian appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. So lasse sich der individuelle Alterszustand eines Menschen an seinem DHEAS-Spiegel feststellen. Was die Untersuchungen kompliziert: Das "Quasi-Hormon" schwankt sowohl im Laufe des Tages (zirkadian) als auch des Jahres (zirkannuell).
  2. Die Professorin am Channing Laboratory des Brigham and Women's Hospital, das zur Harvard Medical School gehört, feierte ihren Aufsehen erregendsten Erfolg 2001 mit einer Studie über zirkadiane Rhythmen, die nachwies, dass Nachtarbeit mit erhöhtem Krebsrisiko verbunden ist, das durch niedrige Melatoninwerte ausgelöst wird.

Synonyms

zirkadianischtagesrhythmisch

Antonyms

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 "zirkadian"?
"zirkadian" is spelled Z-I-R-K-A-D-I-A-N. The IPA pronunciation is [t͡sɪʁkaˈdi̯aːn].
What does "zirkadian" mean?
As an adjective, "zirkadian" means: bei physiologischen Prozessen einem biologischen Rhythmus von zirka einem Tag entsprechend (Blutdruck, Gehirnaktivität, Hormonproduktion, Körpertemperatur, Puls, Schlaf und Anderes)
How do you pronounce "zirkadian"?
The IPA (International Phonetic Alphabet) transcription for "zirkadian" is [t͡sɪʁkaˈdi̯aːn]. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "zirkadian" come from?
"zirkadian" is a German word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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