eosin Chem.
(ˈiːəsɪn)
[f. Gr. ἠώς the morning red, the dawn + -in.]
A red dye-stuff produced by the addition of bromine to a solution of fluorescin in glacial acetic acid. Its potassium salt, known in commerce as ‘soluble eosin’ or ‘eosin’, is used as a rose-coloured dye. Also attrib.
| 1866 A. Flint Princ. Med. (1880) 866 The addition of some coloring agent, such as iodine or eosine, is of assistance in searching for them. 1879 Watts Dict. Chem., Eosin. 1885 Athenæum 27 June 827/3 Coal-tar colours, especially eosine reds, have been employed in the artificial flower manufacture. |