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counterstain

[ noun koun-ter-steyn; verb koun-ter-steyn ]
/ noun ˈkaʊn tərˌsteɪn; verb ˌkaʊn tərˈsteɪn /
Histology
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noun
a second stain of a different color applied to a microscopic specimen and used to color and contrast those parts not retaining the first stain.
verb (used with object)
to treat (a microscopic specimen) with a counterstain.
verb (used without object)
to become counterstained; take a counterstain.
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Origin of counterstain

First recorded in 1890–95; counter- + stain
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use counterstain in a sentence

British Dictionary definitions for counterstain

counterstain
/ (ˈkaʊntəˌsteɪn) /

verb microscopy
to apply two or more stains in sequence to (a specimen to be examined), each of which colours a different tissue
(tr; usually passive) to apply (one of a series of stains) to a specimen to be examinedhaematoxylin is counterstained with eosin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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