eosin

[ ee-uh-sin ]

Phonetic (Standard)IPA

noun

, Chemistry.

Also called bromeosin, tetrabromofluorescein. a red, crystalline, water-insoluble solid, C 20 H 8 Br 4 O 5 , derived from fluorescein by bromination: used chiefly as an acid dye for dyeing silk a rose red color and as a histological stain.
any of a variety of eosinlike dyes.

eosin

/ -ˌsiːn; ˈiːəʊsɪn; ˈiːəʊsɪn /

Also calledbromeosin a red crystalline water-insoluble derivative of fluorescein. Its soluble salts are used as dyes. Formula: C 20 H 8 Br 4 O 5
any of several similar dyes

Origin of eosin¹

1865–70; < Greek ēṓs dawn ( eo- ) + -in ²

Origin of eosin¹

C19: from Greek ēōs dawn + -in ; referring to the colour it gives to silk

Inside the ABS carrying case, you’ll also find a pair of tweezers, collecting vials, a Petri dish, prepared slides, Eosin dye, and more.

Other counterstains may be used such as dilute eosin, dilute fuchsin, or vesuvin.

Wassermann made several eosin preparations, by coupling the sodium derivative with potassium selenocyanide.

The eosin and the selenium were then combined by a method and in a form the details of which have never been published.

In this respect, therefore, they were entirely comparable with the eosin-selenium compound.

Wassermanns results with eosin-selenium were soon critically examined by other observers.

April 19, 2024tortuous

[tawr-choo-uhs ]

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