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
Eosin is a fluorescent red dye resulting from the action of bromine on fluorescein. It can be used to stain cytoplasm, collagen and muscle fibers for examination under the microscope. Structures that stain readily with eosin are termed eosinophilic.
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