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1. Dictionary

   periodic

   /ˌpɪərɪˈɒdɪk/

   adjective

   • 1. appearing or occurring at intervals: "the periodic visits she made to her father"
   • 2. relating to the periodic table of the elements.
   • 3. relating to a rhetorical period.

   Word Origin mid 17th century: from French périodique, or via Latin from Greek periodikos ‘coming round at intervals’, from periodos (see period).

   Scrabble Points: 13

   • P

     3

   • E

     1

   • R

     1

   • I

     1

   • O

     1

   • D

     2

   • I

     1

   • C

     3

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