Definitions for eosinˈi ə sɪn; -sɪn, -ˌsin
Random House Webster's College Dictionary
e•o•sinˈi ə sɪn; -sɪn, -ˌsin(n.)
a red, crystalline, water-insoluble solid, C20H8Br4O5, used chiefly as an acid dye for silk and as a histological stain.
any of a variety of similar dyes.
Origin of eosin:
1865–70; < Gk ēṓs dawn (see eo -) + -in1
a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures
A red, acidic dye commonly used in histological stains.
a yellow or brownish red dyestuff obtained by the action of bromine on fluorescein, and named from the fine rose-red which it imparts to silk. It is also used for making a fine red ink. Its solution is fluorescent