counterstain

verb coun·ter·stain \ ˈkau̇n-tər-ˌstān \

Definition of counterstain

counterstained; counterstaining; counterstains
: to stain (something, such as a microscopy specimen) so as to color parts (such as the cytoplasm of cells) not colored by another stain (such as a nuclear stain)

counterstain

noun

First Known Use of counterstain

1895

in the meaning defined above

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Medical Dictionary

1

counterstain

noun coun·ter·stain \ -ˌstān \

medical Definition of counterstain

: a stain used to color parts of a microscopy specimen not affected by another stain; especially : a cytoplasmic stain used to contrast with or enhance a nuclear stain

2

counterstain

transitive verb

medical Definition of counterstain

: to stain (a tissue or microscopy specimen) with an additional usually contrasting color

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