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thionine

/ˈθaɪəʊˌniːn; -ˌnaɪn/
noun
1.
a crystalline derivative of thiazine used as a violet dye to stain microscope specimens
2.
any of a class of related dyes
Word Origin
C19: by shortening, from ergothioneine, a crystalline betaine found in ergot and blood
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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thionine in Medicine

thionine thi·o·nine (thī'ə-nēn', -nĭn)
n.
A dark-green powder that turns water purple when mixed in solution, used as a basic stain in histology for chromatin and mucin because of its metachromatic properties.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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11
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