1. 
   infradian
   Relating to biologic variations or rhythms occurring in cycles less frequent than every 24 hours. ... Compare: circadian, ultradian. ... Origin: infra-+ L. Dies, day ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?infradian
   
   
2. 
   infradian
   (in″frә-de´әn) pertaining to the rhythmic repetition of certain phenomena of living organisms in cycles of less frequency than one a day; see also infradian rhythm.
   Found op http://www.encyclo.co.uk/local/21001
   
   
3. 
   infradian
   Type: Term Pronunciation: in-frā′dē-ăn Definitions: 1. Relating to biologic variations or rhythms occurring in cycles less frequent than every 24 hours.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=44504
   
   

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