[ 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 ni·gro·sin [nahy-gruh-sin] /ˈnaɪ grə sɪn/.

Origin of nigrosine

1890–95; < Latin nigr- (stem of niger) black, dark + -ose1 + -ine1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for nigrosine


nigrosin (ˈnɪɡrəsɪn)

/ (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 for nigrosine

C19: from Latin niger black + -ose 1 + -ine 1
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

Medical definitions for nigrosine

[ nīgrə-sēn′, -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.