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 (pī′rə-nĭn) also py·ro·nine (-nēn′)
Any of a group of xanthene dyes used as a biological stain, especially to detect or track the presence of RNA by staining it red.

[German Pyronin, originally a trademark.]
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.


(ˈpaɪ rəˌnin)

a xanthine dye used for detecting the presence of RNA.
[1890–95; < German Pyronin, orig. a trademark]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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To date, several binary metal/[Cu.sub.2]O heterogeneous nanostructures such as Cu/[Cu.sub.2]O [13], Au/[Cu.sub.2]O [14, 15], and Ag/[Cu.sub.2]O [16, 17] have been successfully prepared and have shown expected enhanced photocatalytic activities in degradation of organic dyes like MO [13, 16, 17], methylene blue (MB) [14], and pyronine B [15] compared to pure [Cu.sub.2]O.