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   circadian

   /səːˈkeɪdɪən/

   adjective

   • 1. (of biological processes) recurring naturally on a twenty-four-hour cycle, even in the absence of light fluctuations: "a circadian rhythm"

   Word Origin 1950s: formed irregularly from Latin circa ‘about’ + dies ‘day’.

   Scrabble Points: 14

   • C

     3

   • I

     1

   • R

     1

   • C

     3

   • A

     1

   • D

     2

   • I

     1

   • A

     1

   • N

     1

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