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A dye used in dentistry as a diagnostic aid, applied to the teeth to reveal the presence of dental plaque. Also called disclosing solution.
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.
(Dentistry) dentistry a vegetable dye, administered as a liquid or in tablet form (disclosing tablet), that stains plaque, making it readily apparent on the teeth
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014