- a rose-colored dye, CHOBr, prepared by brominating fluorescein and used to color inks, fabrics, etc. and to stain tissues
- its sodium or potassium salt, used as a reddish dye and as a stain in microscopy
- any of various similar red dyes
Origin of eosinfrom Classical Greek ??s, dawn (see eo-) + -in
- A yellowish-red crystalline powder, C20H8 Br4O5, used in textile dyeing and ink manufacturing, as a biological stain, and in coloring gasoline.
- Any of a group of red fluorescent bromine derivatives of fluorescein, or their sodium or potassium salts, used in ink manufacturing, textile dyeing, and in biology to stain cells.
Origin of eosinGreek ēōs dawn (from its color) ; see aus- in Indo-European roots. -in
(countable and uncountable, plural eosins)