Etymology

Burgundy mixture

Today it means: A mixture of copper sulphate and sodium carbonate, used as a fungicidal spray for trees and small fruits. Full definition →

French bouillie bourguignonne
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The story

  1. French · calque ofbouillie bourguignonne
  2. English todayBurgundy mixture

Calque of French bouillie bourguignonne, after the French district of Burgundy, where it was first used to treat grapes and vines.

Etymology from Wiktionary, CC BY-SA 4.0.