Etymology
1. counterstain
noun. a stain of contrasting color that is used when the principal stain does not show the structure clearly.
Etymology
- counter- (English)
- stain (English)
- steinen (Middle English (1100-1500))
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Example sentences of the word counterstain
1. Noun, singular or mass
Accordingly, the counterstain** colors the remaining peptidoglycan layer, resulting in a characteristic Gram-negative stain.