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Related to eosine: methylene blue, Betadine


1. A yellowish-red crystalline powder, C20H8 Br4O5, used in textile dyeing and ink manufacturing, as a biological stain, and in coloring gasoline.
2. 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.

[Greek ēōs, dawn (from its color); see aus- in Indo-European roots + -in.]


(ˈiːəʊsɪn) or


1. (Elements & Compounds) Also called: bromeosin a red crystalline water-insoluble derivative of fluorescein. Its soluble salts are used as dyes. Formula: C20H8Br4O5
2. (Dyeing) any of several similar dyes
[C19: from Greek ēōs dawn + -in; referring to the colour it gives to silk]
ˌeoˈsinic adj
ˈeosin-ˌlike adj


(ˈi ə sɪn)

also e•o•sine

(-sɪn, -ˌsin)

1. a red, crystalline, water-insoluble solid, C20H8Br4O5, used chiefly as an acid dye for silk and as a histological stain.
2. any of a variety of similar dyes.
[1865–70; < Greek ēṓs dawn (see eo-) + -in1]
e`o•sin′ic, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.eosin - a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures
fluorescein, fluoresceine, fluorescent dye, resorcinolphthalein - a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)


n. eosina, sustancia insoluble usada como colorante rojo en algunos tejidos que se estudian bajo el microscopio.
References in periodicals archive ?
Formalin fixed tissues were embedded in paraffin and core region of tissues (5um thickness) were mounted on the glass slides and stained with Hematoxline and Eosine.
Sectioning was done with microtome followed by staining with hematoxyline and eosine.
A loopful from each positive EC broth tubes (showing gas production) was streaked onto eosine methylene blue agar.
1ml of the samples was spread plated on MacConkey agar (Hi media, India) and Eosine Methylene Blue (EMB) agar (Himedia, India).
Smears were stained by Hematoxyline and Eosine and Giemsa methods.
After routine Hematoxyline and Eosine (HandE) stain examination, a panel of immunohistochemical stains was applied on formalin fixed paraffin embedded tissue.
Aspect histologique d'un mesotheliome de type epitheliode (grossissement x 4 avec coloration a l'hemateine eosine safran)
After 5 hours of incubation the nutrient agar, Eosine methyline blue (EMB) agar and MacConkey agar were used for isolation and differentiation (Fig.