eosin

A derivative of fluorescein used as a fluorescent acid dye for cytoplasmic stains and counterstains in histology and in Romanovsky-type blood stains. [G. eos, dawn]
- e. B the disodium salt of 4′,5′-dibromo-2′,7′-dinitrofluorescein. SYN: acid red 91, e. I bluish. [C.I. 45400]
- e. I bluish SYN: e. B.
- e. y, e. Y the disodium salt of 2′,4′,5′,7′-tetrabromofluorescein. SYN: acid red 87, e. yellowish. [C.I. 45380]
- e. yellowish SYN: e. y.
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eosinophil

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eo·sin 'ē-ə-sən also eo·sine -sən, -.sēn n
1) a red fluorescent dye C20H8Br405 obtained by the action of bromine on fluorescein and used esp. in cosmetics and as a toner also its red to brown sodium or potassium salt used esp. as a biological stain for cytoplasmic structures
2) any of several dyes related to eosin

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n.
a red acidic dye, produced by the reaction of bromine and fluorescein, used to stain biological specimens for microscopical examination. Eosin may be used in conjunction with a contrasting blue alkaline dye taken up by different parts of the same specimen.

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eo·sin (eґo-sin) [Gr. ēōs dawn] any of a group of related pink to red acid dyes that are halogenated derivatives of fluorescein, including eosins B and Y and ethyl eosin, as well as other related compounds. When used specifically, the term usually denotes eosin Y.

Medical dictionary. 2011.

Look at other dictionaries:

  • EOSIN — EOSIN, группа кислых двуосновных ок сифталеиновых красок, широко применяемых в микроскоп.технике. Марки: 1. «Eosin», или «Eosin gelblich», или «Eosin wasserlos lich» (Eosin A.. E^osin G., Eosin extra Hochst)… …   Большая медицинская энциклопедия

  • eosin Y — eosin yellowish, eosin Y ws the sodium salt of tetrabromofluorescein, C20H6Br4Na2O5, a water soluble, red, anionic dye of the eosin group; widely used in bacteriologic and histologic staining …   Medical dictionary

  • eosin B — eosin I bluish dibromodinitrofluorescein, a dye having staining properties similar to eosin Y, but having a bluish rather than yellow cast …   Medical dictionary

  • Eosin — E o*sin, n. [Gr. ? dawn.] (Chem.) A yellow or brownish red dyestuff obtained by the action of bromine on fluoresce[ i]n, 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… …   The Collaborative International Dictionary of English

  • Eosīn — Eosīn, Farbstoff, s. Fluoresceïn …   Meyers Großes Konversations-Lexikon

  • Eosin — Eosin, s. Farbstoffe, künstliche organische …   Lexikon der gesamten Technik

  • Eosin — Eosīn, roter Farbstoff zum Färben von Seide und Wolle, entsteht durch Einwirken von Brom auf Fluoreszeïn, dient zum Papierfärben, zur Herstellung von Lacken und roter Tinte. Eosinophīl (grch.), sich leicht mit E. färbend; eosinophile Zellen, Art… …   Kleines Konversations-Lexikon

  • eosin — [ē′əsin, ē′əsēn΄ē′ō sin, ē′əsin] n. [< Gr ēōs, dawn (see EO ) + IN1] 1. a) a rose colored dye, C20H8O5Br4, prepared by brominating fluorescein and used to color inks, fabrics, etc. and to stain tissues b) its sodium or potassium salt, used as… …   English World dictionary

  • Eosin Y — Strukturformel Allgemeines Name Eosin Y Andere Namen …   Deutsch Wikipedia

  • Eosin — For the eosin glazing process, see Zsolnay. Eosin Y …   Wikipedia

  • Eosin B — Strukturformel Allgemeines Name Eosin B Andere Namen …   Deutsch Wikipedia

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