Also -ine. [f. next + -IN1, -INE5; from the resemblance of the color to that of the flowers of some species of Tropæolum.] Any one of several orange dyes, of complex composition, belonging to the class of sulphonic acids.
1880. Friswell, in Jrnl. Soc. Arts, 446. This body has been used as a dye, under the name of Tropæoline O.
1881. Watts, Dict. Chem., VIII. 1857. Diazinsulphonic Acids … Sulphoxybenzenephenols…. Some of them are dye-stuffs, known in commerce as tropæoline, chrysoïdine, roccelline, &c.
1897. Allbutt’s Syst. Med., II. 522. Watery solution of tropæolin.
