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Circadian

//sɚˈkeɪ.di.ən// adj

Definitions

Adjective
  1. 1
    Of, relating to, or showing rhythmic behaviour with a period of approximately 24 hours; especially of a biological process. not-comparable

    "The circadian clock is involved in the regulation of the diurnal sleep-wake cycle, […]."

Adjective
  1. 1
    of or relating to biological processes occurring at 24-hour intervals wordnet

Etymology

From the Latin circā (“about”) and diēs (“a day”) with the English suffix -an. Compare circannual.

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