erythrosin

from The Century Dictionary.

• noun A coal-tar color of the xanthene type, the sodium or potassium salt of tetra-iodofluorescein. It dyes wool and silk bluish red or pink in a slightly acid bath. Also called erythrosin B, erythrosin D, eosin J, pyrosine B, and iodeosine B.

from the GNU version of the Collaborative International Dictionary of English.

• noun A red substance formed by the oxidation of tyrosin.
• noun A red dyestuff obtained from fluoresceïn by the action of iodine.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry A red substance formed by the oxidation of tyrosin.
• noun chemistry A red dyestuff obtained from fluorescein by the action of iodine.