azuline|ˈæzjʊlaɪn| [? f.Sp.azul blue + -ine; cf.azurine.] A particular shade of blue. 1864G. Gladstone in Reader 8 Oct. 450/3 Solutions of chromium salts..litmus, azuline.1883M. Haweis in Contemp.Rev. 423 Shades of colour known by such names as..Magenta, Alexandra blue, azuline.