lac dye(n = noun.substance) - scarlet dye like cochineal; extracted with alkali from stick lac;
is a kind of dye, dyestuff

acid dye, aniline dye, azo dye, basic dye, cyanine dye, direct dye, double dye, dye, fast dye, fluorescent dye, garnet lac, hair dye, lac, lac wax, metallized dye, radiopaque dye, seed lac, sonora lac, stick lac, substantive dye, vat dye