• synonyms


[nahy-gruh-seen, -sin]
noun Chemistry.
  1. 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.
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Also ni·gro·sin [nahy-gruh-sin] /ˈnaɪ grə sɪn/.

Origin of nigrosine

1890–95; < Latin nigr- (stem of niger) black, dark + -ose1 + -ine1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for nigrosine

Historical Examples

  • Black: Nigrosine black, four ounces, dissolved in one gallon of boiling water.

    Advanced Toy Making for Schools

    David M. Mitchell

  • Nigrosine is a black ink, which, although not producing a black so intense as common ink, possesses various advantages.

British Dictionary definitions for nigrosine


nigrosin (ˈnɪɡrəsɪn)

  1. any of a class of black pigments and dyes obtained from aniline: used in inks and shoe polishes and for dyeing textiles
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Word Origin

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

nigrosine in Medicine


(nīgrə-sēn′, -sĭn)
  1. 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.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.