circadian

American  

[sur-key-dee-uhn] / sɜrˈkeɪ di ən /

adjective

Physiology.

1. of or relating to a biorhythm or regular biological cycle occurring once every 24 hours, such as waking and sleeping.

   Exposure to blue light at night can disrupt your circadian rhythm, making your biological clock think it's earlier in the day rather than time for bed.

   He is doing research related to the circadian cycling of hormones.

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circadian British  

/ sɜːˈkeɪdɪən /

adjective

1. of or relating to biological processes that occur regularly at about 24-hour intervals, even in the absence of periodicity in the environment See also biological clock

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Etymology

Origin of circadian

First recorded in 1955–60; from circā “about” + Latin di(ēs) “day” + -an ( def. ); circa ( def. )

Example Sentences

The more blue-white tones in the lighting, and the brighter it is, the more it helps support our circadian rhythms—the biological clocks inside our cells that drive our cycles of sleepiness and wakefulness.

From The Wall Street Journal

"These things are not rocket science, but they're really fundamental to having a good, healthy circadian rhythm and a good healthy physiology through the winter."

From BBC

The body's circadian system regulates roughly 20% of all genes in the human genome, orchestrating vital processes such as digestion, immune response, and sleep-wake cycles.

From Science Daily

Horner noted that future studies could test whether reducing screen exposure in the hours before bedtime, when screen light may disrupt circadian rhythms and delay sleep onset, helps lower cardiometabolic risk.

From Science Daily

The study, published in Nature Aging, explored how changes in the circadian system affect brain health and memory in mouse models of Alzheimer's disease.

From Science Daily

Related Words

• constantly
• day-to-day
• everyday
• often
• periodic
• regular
• regularly
• routine