tropæolin
(trəʊˈpiːəlɪn)
Also -ine.
[f. next + -in1, -ine5; from the resemblance of the colour 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. |