2. a primary subtractive color for light; a dark purple-red color; the dye for magenta was discovered in 1859, the year of the battle of Magenta
3. a battle in 1859 in which the French and Sardinian forces under Napoleon III defeated the Austrians under Francis Joseph I
4. An aniline dye obtained as an amorphous substance having a green bronze surface color, which dissolves to a shade of red; also, the color; -- so called from Magenta, in Italy, in allusion to the battle fought there about the time the dye was discovered. Called also fuchsine, roseïne, etc.