- a fungicide consisting of a mixture of copper sulfate, lime, and water.
Origin of Bordeaux mixture
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- horticulture a fungicide consisting of a solution of equal quantities of copper sulphate and quicklime
C19: loose translation of French bouillie bordelaise, from bouillir to boil + bordelais of Bordeaux