contrast stain

con·trast stain

a dye used to color one portion of a tissue or cell that remained unaffected when the other part was stained by a dye of different color.

Synonym(s): differential stain

Farlex Partner Medical Dictionary © Farlex 2012

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.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012