Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of a class of dyes, varying from blue to black, used in the manufacture of inks and for dyeing wood and textiles.
from The Century Dictionary.
- noun The name is applied to three different coal-tar colors:
- noun Spirit-soluble nigrosine, which is closely allied to spirit-soluble induliue.
- noun Water-soluble nigrosine, which is the sodium salt of certain snlphonic acids of spirit-soluble nigrosine.
- noun Methylene gray (which see, under
gray ). - noun A coal-tar color used in dyeing, prepared from the hydrochlorid of violaniline.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) A dark blue dyestuff, of the induline group; -- called also
azodiphenyl blue .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A dark blue
synthetic dyestuff of theinduline group.
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[Latin niger, nigr-, black; see nekw-t- in Indo-European roots + –os(e) + –ine.]
from Wiktionary, Creative Commons Attribution/Share-Alike License
Latin niger, "black".
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Examples
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Experimentations in 1878 with the insoluble aniline blacks and vanadium were unsuccessful; but the soluble aniline black (blue-black) known as nigrosine they used and still use in various combinations.
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Such inks are made from a fine, cheap powder, of which nigrosine is used in making black inks, eosine for red, and methylene for blue ink, and they cost only a few dimes a gallon to manufacture.
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