circadian rhythm love

circadian rhythm


from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A daily rhythmic activity cycle, based on 24-hour intervals, that is exhibited by many organisms.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The "internal body clock" that regulates the (roughly) 24-hour cycle of biological processes in animals and plants.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a daily cycle of activity observed in many living organisms


Sorry, no etymologies found.


Sorry, no example sentences found.

Wordnik is becoming a not-for-profit! Read our announcement here.


Log in or sign up to get involved in the conversation. It's quick and easy.

  • Innate, daily, fluctuation of behavioral and physiological functions, including sleep waking, generally tied to the 24 hour day-night cycle but sometimes to a different (e.g., 23 or 25 hour) periodicity when light/dark and other time cues are removed.

    May 13, 2008