circadian
Use Circadian in a sentence
di adjective
noting or pertaining to rhythmic biological cycles recurring at approximately 24-hour intervals.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To circadian
Collins
World English Dictionary
circadian (sɜːˈkeɪdɪən) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —adj | |
| See also biological clock of or relating to biological processes that occur regularly at about 24-hour intervals, even in the absence of periodicity in the environment | |
| [C20: from Latin circa about + diēs day] | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Circadian
is always a great word to know.
So is doohickey. Does it mean:
| a gadget; dingus; thingumbob. |
| the offspring of a zebra and a donkey. |
Etymonline
Word Origin & History
circadian
coined 1959 from L. circa "about" + diem, acc. sing. of dies "day" (see diurnal). The original use is in circadian rhythm.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary
circadian cir·ca·di·an (sər-kā'dē-ən, -kād'ē-, sûr'kə-dī'ən, -dē'-)
adj.
Relating to biological variations or rhythms with a cycle of about 24 hours.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The hormone melatonin regulates the circadian rhythm--the sleep cycle.
One of the brain centers that is thus permanently damaged is the circadian clock.
Other brands contain melatonin, the hormone that maintains your body's circadian clock, but also can make you sleepy.
The same is true for circadian rhythms in fruit flies.
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