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Definition of Circadian rhythm
1. Noun. A daily cycle of activity observed in many living organisms.
Definition of Circadian rhythm
1. Noun. The "internal body clock" that regulates the (roughly) 24-hour cycle of biological processes in animals and plants. ¹
¹ Source: wiktionary.com
Medical Definition of Circadian rhythm
1. The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs and stimuli, hormone secretion, sleeping, feeding, etc. This rhythm seems to be set by a 'biological clock' which seems to be set by recurring daylight and darkness. (12 Dec 1998)
Lexicographical Neighbors of Circadian Rhythm
Literary usage of Circadian rhythm
Below you will find example usage of this term as found in modern and/or classical literature:
1. Science by American Association for the Advancement of Science (1883)
"A circadian rhythm was observed in the electrical signal emanating from the ...
Alterations of circadian rhythm of heart rate can be manipulated by subtle ..."
2. A Lifelong Passion: Nicholas and Alexandra: Their Own Story by Andrei Maylunas (2005)
"In 26 patients (65-80 yr) with low risk of sudden death, the circadian rhythm of
spontaneous ventricular arrhythmias was analyzed, throughout 72 h, ..."
3. Proceedings of the Society for Experimental Biology and Medicine (1903)
"The circadian rhythm in pineal melatonin content of female hamsters reported in
this study is of similar magnitude and duration as that reported for male ..."
4. Biological Rhythms: Implications for the Worker by DIANE Publishing Company (1994)
"See circadian rhythm. Circadian pacemaker: An internal timekeeping mechanism
capable of ... circadian rhythm: A self-sustained biological rhythm which in an ..."
5. Stress, Gender, and Alcohol-Seeking Behavior edited by Walter A. Hunt, Sam Zakhari (1996)
"At the trough of the CORT circadian rhythm, FAE females showed less suppression of
... At the peak of the CORT circadian rhythm, however, FAE males showed a ..."
6. Gene Expression in Field Crops: Bibliography January 1991-November 1992 edited by Janet Saunders, Robert D. Warmbrodt (1995)
"We have previously shown that this variation is at thelevel of Cat3 gene
transcription and is under the control of a novel circadian rhythm. ..."
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