1. counterstain

noun. a stain of contrasting color that is used when the principal stain does not show the structure clearly.


  • counter- (English)
  • stain (English)
  • steinen (Middle English (1100-1500))

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Sentences with counterstain

1. Noun, singular or mass
Accordingly, the counterstain** colors the remaining peptidoglycan layer, resulting in a characteristic Gram-negative stain.