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- DictionaryCir·ca·di·an/sərˈkādēən/
adjective
- 1. (of biological processes) recurring naturally on a twenty-four-hour cycle, even in the absence of light fluctuations: "a circadian rhythm"
A circadian rhythm (/ s ər ˈ k eɪ d i ə n /), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours. Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (is entrained by the environment).
Circadian definition: of or relating to a biorhythm or regular biological cycle occurring once every 24 hours, such as waking and sleeping. See examples of CIRCADIAN used in a sentence.
Dec 11, 2023 · Circadian rhythms are the physical, mental, and behavioral changes an organism experiences over a 24-hour cycle. Light and dark have the biggest influence on circadian rhythms, but food intake, stress, physical activity, social environment, and temperature also affect them.
Apr 11, 2024 · circadian rhythm, the cyclical 24-hour period of human biological activity. Within the circadian (24-hour) cycle, a person usually sleeps approximately 8 hours and is awake 16. During the wakeful hours, mental and physical functions are most active and tissue cell growth increases.
adjective. biology specialized uk / sɜːˈkeɪ.di.ən / us / sɝːˈkeɪ.di.ən / Add to word list. used to describe the processes in animals and plants that happen naturally during a 24-hour period: The authors discuss the evolutionary history of circadian systems in mammals, birds, insects, fungi, and bacteria.
Nov 29, 2022 · A circadian rhythm is a natural process governing physiological and behavioral changes. The term circadian comes from the Latin phrase “circa diem,” which means “around a day.” The circadian rhythm is entrained for 24 hours in the human body and is commonly referred to as the body ’s biological clock.
adjective. biology specialized us / sɝːˈkeɪ.di.ən / uk / sɜːˈkeɪ.di.ən / Add to word list Add to word list. used to describe the processes in animals and plants that happen naturally during a 24-hour period: The authors discuss the evolutionary history of circadian systems in mammals, birds, insects, fungi, and bacteria.
