Webster's English Dictionary

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parallelogram

par.al.lel.o.gram \.par-*-'lel-*-.gram\ n [LL or Gk; LL parallelogrammum, 
   fr. Gk parallelogrammon, fr. neut.]of parallelogrammos bounded by parallel 
   lines, fr. paralle-los + gramme- line, fr. graphein to write - more at 
   CARVE : a quadrilateral with opposite sides parallel and equal