Webster's English Dictionary

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periphery

Cross references:
  1. circumference         
 
pe.riph.ery \p*-'rif-(*-)re-\ n [MF peripherie, fr. LL peripheria, fr. Gk 
   periphereia, fr. Xperipherein to carry around, fr. peri- + pherein to carry 
   - more at BEAR 1: the perimeter of a circle or other closed curve; also : 
   the peri meter of a polygon 2: the external boundary or surface of a body  
   3a: the outward bounds of something as distinguished from its internal regi 
   ons or center : CONFINES 3b: an area lying beyond the strict limits of a 
   thing  4: the regions in which nerves terminate