any of a group of blue-black or black dyes used as pigments
Origin of nigrosinefrom Classical Latin niger, black + -os(e) + -ine
Any of a class of dyes, varying from blue to black, used in the manufacture of inks and for dyeing wood and textiles.
Origin of nigrosineLatin niger nigr- black ; see nekw-t- in Indo-European roots. -os(e) 2 -ine 2