Etymology

Javel water

Today it means: sodium hypochlorite, the earliest chemical bleach. Full definition →

French eau de Javel
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The story

  1. French · calque ofeau de Javel
  2. English todayJavel water

Calque of French eau de Javel, after the village (now Parisian neighbourhood) where it was produced.

Etymology from Wiktionary, CC BY-SA 4.0.