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[nahy-gruh-seen, -sin] /ˈnaɪ grəˌsin, -sɪn/
noun, Chemistry.
any of the class of deep blue or black dyes obtained by the oxidation of aniline, used as coloring agents in inks and shoe polishes and for dyeing leather, wood, textiles, and furs.
Also, nigrosin
[nahy-gruh-sin] /ˈnaɪ grə sɪn/ (Show IPA)
Origin of nigrosine
1890-95; < Latin nigr- (stem of niger) black, dark + -ose1 + -ine1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for nigrosin


/ˈnɪɡrəˌsiːn; -sɪn/
any of a class of black pigments and dyes obtained from aniline: used in inks and shoe polishes and for dyeing textiles
Word Origin
C19: from Latin niger black + -ose1 + -ine1
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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nigrosin in Medicine

nigrosine (nī'grə-sēn', -sĭn) or ni·gro·sin (-sĭn)
Any of a class of aniline dyes that vary from blue to black and are used as stains for nervous tissue and as a negative stain for bacteria and spirochetes.

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