Meanings
nouncircadian clock (plural circadian clocks)
plural circadian clocks
- Synonym of circadian rhythm.
Light at night may be interfering with the circadian clock in some way, perhaps by stopping the production of melatonin, a hormone that helps differentiate day from night.
2025 December 9, Veronique Greenwood, “Your Bedroom Probably Isn't Dark Enough”, in TIMESynonyms: circadian rhythm
Synonyms & antonyms
nounSynonym of circadian rhythm.
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APA
circadian clock. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/circadian%20clock
MLA
“circadian clock.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/circadian%20clock. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “circadian clock,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/circadian%20clock.
Source: circadian clock on Wiktionary, CC BY-SA 4.0.