counterstain(redirected from counterstains)
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A stain of a contrasting color used to color the components in a microscopic specimen that are not made visible by the principal stain.
tr.v. coun·ter·stained, coun·ter·stain·ing, coun·ter·stains
To color (a microscopic specimen) with such a stain.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Biology) to apply two or more stains in sequence to (a specimen to be examined), each of which colours a different tissue
2. (Biology) (tr; usually passive) to apply (one of a series of stains) to a specimen to be examined: haematoxylin is counterstained with eosin.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. a second stain applied to a microscopic specimen for contrast.v.t.
2. to treat (a microscopic specimen) with a counterstain.v.i.
3. to become counterstained; take a counterstain.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Past participle: counterstained
Collins English Verb Tables © HarperCollins Publishers 2011
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|Noun||1.||counterstain - a stain of contrasting color that is used when the principal stain does not show the structure clearly|
stain - (microscopy) a dye or other coloring material that is used in microscopy to make structures visible
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