Etymology

decametre

D2E1C3A1M3E1T1R1E1

Today it means: An SI unit of length equal to 10¹ metres. Symbol: dam Full definition →

French décamètre
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The story

  1. French · borrowed fromdécamètre
  2. English todaydecametre

Borrowed from French décamètre. By surface analysis, deca- + metre.

Etymology from Wiktionary, CC BY-SA 4.0.