ni·gro·sine 
(nīgrə-sēn′, -sĭn)
(nīgrə-sēn′, -sĭn)n.
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 the Appendix of Indo-European roots + -OS(E)2 + -INE2.]
- (Louis) Hector
- Louis Henry
- Louisiana
- Louisiana French
- Louisiana Purchase
- Louis II de Bourbon.
- Louis Isadore
- Louis IX
- Louis Jacques Mandé
- Louis Joseph de
- Louis Joseph de Bourbon.
- Louis Moreau
- Louis Napoleon
- Louis Napoleon.
- Louis Philippe
- Louis Quatorze
- Louis Quinze
- Louis Seize
- Louis Stephen
- "Louis the Great"
- Louis Treize
- Louis (Victor Pierre Raymond)
- Louis VII
- Louisville
- Louis XIII