Etymology

parallelogram

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Today it means: A convex quadrilateral in which each pair of opposite edges are parallel and of equal length. Full definition →

Latin parallelogrammum ← Ancient Greek παράλληλος
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The story

  1. Ancient Greek · derived fromπαράλληλος“parallel”
  2. Latin · derived fromparallelogrammum
  3. English todayparallelogram

From Latin parallelogrammum, from Ancient Greek παράλληλος (parállēlos, “parallel”) + γραμμή (grammḗ, “line”).

Etymology from Wiktionary, CC BY-SA 4.0.