Definition of counterstain in English:


Syllabification: coun·ter·stain
Pronunciation: /ˈkountərˌstān


  • An additional dye used in a microscopy specimen to produce a contrasting background or to make clearer the distinction between different kinds of tissue.
    More 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.


[with object] Back to top  
  • Treat (a specimen) with a counterstain.
    More 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).

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Word of the day skosh
Pronunciation: skəʊʃ
a small amount; a little