circadian

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circadian

  • /səˈkeɪ.dɪ.ən/ UK
  • /sɚˈkeɪ.di.ən/ US
  • /sɚˈkæd.i.ən/ US
  • /ˌsɝ.kəˈdi.ən/ US
  • /ˌsɝ.kəˈdaɪ.ən/ US

Where it comes from

From Latin circā (“around”) + diēs (“day”) + English -an. Compare circannual.

adjective

  1. not comparable Of, relating to, or showing rhythmic behaviour with a period of approximately 24 hours; especially of a biological process. The circadian clock is involved in the regulation of the diurnal sleep-wake cycle, […].

    Similar: hemeral, nyctohemeral, diurnal, quotidian, circadian, daily, nychthemeral, per diem

Thesaurus

Closest in meaning: cyclic, cyclical, biological, organic, quotidian, daily, diurnal, diel, daylong, day-to-day, nycthemeral, nychthemeral, daylength, biorhythmic, circhoral, circalunar

Translations

Every language

adj relating to rhythmic behavior with a period of 24 hours

Españolcircadiano
日本語晦日 kaijitsu
Françaiscircadien
Deutschcircadian, zirkadian
Italianocircadiano
Ελληνικάκιρκάδιος kirkádios
Русскийциркадный cirkadnyj, циркадианный cirkadiannyj

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Cite this
MLA

"circadian." Wiktionary, via Micwyn, micwyn.com/word/circadian. Accessed 6 Nov. 2026.

APA

circadian. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/circadian

Chicago

"circadian." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/circadian.

BibTeX
@misc{circadian_2026,
  title = {circadian},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/circadian},
  urldate = {2026-11-06}
}