circadian

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circadian

 [ser″kah-de´an, ser-ka´de-an]
denoting a period of one day, or repeating every day; see circadian rhythm.
circadian rhythm sleep disorder a sleep disorder of the dyssomnia group, consisting of a lack of synchrony between the schedule of sleeping and waking required by the external environment and that of the person's own circadian rhythm. The cause is usually environmental, such as rotating shift work or long-distance air travel, but some individuals simply have natural circadian rhythms sharply different from the predominant one of their society.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

cir·ca·di·an

(ser-kā'dē-ăn),
Relating to biologic variations or rhythms with a cycle of about 24 hours. Compare: infradian, ultradian.
[L. circa, about, + dies, day]
Farlex Partner Medical Dictionary © Farlex 2012

circadian

(sər-kā′dē-ən, -kăd′ē-, sûr′kə-dī′ən, -dē′-)
adj. Biology
Relating to or exhibiting approximately 24-hour periodicity.

cir·ca′di·an·ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

cir·ca·di·an

(sĭr-kā'dē-ăn)
Relating to biologic variations or rhythms with a cycle of about 24 hours.
Compare: infradian, ultradian
[L. circa, about, + dies, day]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

circadian

Exhibiting a 24 hour periodicity.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

Circadian

Pertaining to biological rhythms occurring at approximately 24-hour intervals. Jet lag is caused by a disruption of the human body's circadian clock.
Mentioned in: Jet Lag
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

cir·ca·di·an

(sĭr-kā'dē-ăn)
Relating to biologic variations or rhythms with a cycle of about 24 hours.
[L. circa, about, + dies, day]
Medical Dictionary for the Dental Professions © Farlex 2012