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 (nī′grə-sēn′, -sĭn)
Any of a class of dyes, varying from blue to black, used in the manufacture of inks and for dyeing wood and textiles.

[Latin niger, nigr-, black; see nekw-t- in Indo-European roots + -os(e) + -ine.]
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.


(ˈnɪɡrəˌsiːn; -sɪn) or


(Dyeing) any of a class of black pigments and dyes obtained from aniline: used in inks and shoe polishes and for dyeing textiles
[C19: from Latin niger black + -ose1 + -ine1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈnaɪ grəˌsin, -sɪn)

any of the class of deep blue or black dyes obtained by the oxidation of aniline.
[1890–95; < Latin nigr-, s. of niger black, dark + -ose2 + -ine1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
ENGINEERING MASTEBATCH - the company offer Polyamide based masterbatch based on standard carbon blacks, high jet carbon blacks and solvent black dyestuff (nigrosine).
They added a nigrosine dye to mask the scent of the swimmer and to diffuse around him a dark cloud to screen him from view.
Americhem Inc., Cuyahoga Falls, Ohio, has launched a new line of highly concentrated, low-aniline, nigrosine black nylon masterbatches suited to automotive under-hood and other applications where retention of physical properties is important.
The letter, "Nigrosine the Forgotten Stain", was written in response to the claims of another author that nigrosin was as sensitive as gold stain for protein detection on CA.
The ink contained `a synthetic dye of the nigrosine type' which, he concluded, was not available in Victorian times.