Definition of counterstain in English:

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counterstain

Pronunciation: /ˈkaʊntəˌsteɪn/
Biology

noun

An additional dye used in a microscopy specimen to produce a contrasting background or to make clearer the distinction between different kinds of tissue.
Example sentences
  • Dapi was used as the chromosome counterstain for fluorescent specimens.
  • The shape of the nucleus was visualized using a DNA counterstain in all experiments.
  • No counterstain was used on the sections, but routine coverslips were applied.

verb

[with object]
Treat (a specimen) with a counterstain.
Example sentences
  • After washing in tap water, specimens were briefly counterstained.
  • Background material in the specimen was counterstained dull yellow to red.
  • The chromosomes are counterstained with DAPI (light blue).

For editors and proofreaders

Line breaks: coun¦ter|stain

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