1. 
   circadian
   [adj] - of or relating to biological processes occurring at 24-hour intervals
   Found op http://www.webdictionary.co.uk/definition.php?query=circadian
   
   
2. 
   circadian
   nychthemeral Relating to or exhibiting an approximately 24-hour periodicity.
   Found op http://sis.nlm.nih.gov/enviro/iupacglossary/glossaryc.html
   
   
3. 
   Circadian
   Circadian: Refers to events occurring within a 24-hour period, in the span of a full (24-hour) day, as in a circadian rhythm. Circadian rhythmicity is a fundamental property possessed by all organisms. These rhythms are driven by an internal time-keeping system: a clock. Changes in the external envi...
   Found op http://www.medterms.com/script/main/art.html?articlekey=6766
   
   
4. 
   circadian
   Relating to biologic variations or rhythms with a cycle of about 24 hours. ... Compare: infradian, ultradian. ... Origin: L. Circa, about, + dies, day ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?circadian
   
   
5. 
   circadian
   adjective of or relating to biological processes occurring at 24-hour intervals; `circadian rhythms`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=circadian
   
   
6. 
   circadian
   (sәr-ka´de-әn) denoting a period of one day, or repeating every day; see circadian rhythm.
   Found op http://www.encyclo.co.uk/local/21001
   
   
7. 
   circadian
   circadian Designating physiological activity that occurs approximately every twenty-four hours, or the rhythm of such activity.
   Found op http://www.wordinfo.info/words/index/info/view_unit/2459/
   
   
8. 
   circadian
   Type: Term Pronunciation: ser-kā′dē-ăn Definitions: 1. Relating to biologic variations or rhythms with a cycle of about 24 hours.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=17706
   
   
9. 
   circadian
   1) Time unit 2) Unit of time
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/circadian/1
   
   

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