counterstain

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counterstain

 [kown´ter-stān]
a stain applied to render the effects of another stain more discernible.

count·er·stain

(kown'ter-stān),
A second stain of different color having affinity for tissues, cells, or parts of cells other than those taking the primary stain used to render more distinct the parts taking the first stain.

counterstain

(koun′tər-stān′)
n.
A stain of a contrasting color used to color the components in a microscopic specimen that are not made visible by the principal stain.
tr.v. counter·stained, counter·staining, counter·stains
To color (a microscopic specimen) with such a stain.

count·er·stain

(kown'tĕr-stān)
A second stain of a different color, having affinity for tissues, cells, or parts of cells other than those taking the primary stain, used to render more distinct the parts taking the first stain.
Synonym(s): contrase stain.