To remove stains or discoloration from something, especially in laboratory work on biological specimens.
From de- (to remove) + stain; used primarily in scientific and medical contexts since the 19th century, especially in histology and microscopy.
Pathologists and biologists use destaining as a critical step in preparing slides—they carefully remove excess dyes from tissue samples so the important parts stand out under the microscope, making it possible to spot cancer cells and diagnose diseases.
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