eosin
[ee-uh-sin]
- Also called bromeosin, tetrabromofluorescein. a red, crystalline, water-insoluble solid, C20H8Br4O5, 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.
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Also e·o·sine [ee-uh-sin, -seen] /ˈi ə sɪn, -ˌsin/.
Origin of eosin
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for eosine
Historical Examples
The dyes with the ponceaus are faster than those with eosine or safranine.
The Practical Ostrich Feather DyerAlexander Paul
The eosine plate was underexposed, but brought up everything fairly well except the scarlet hat, which came up like black.
Very good results in soap may be obtained by mixing a fast blue, as ultramarine or cobalt blue, with a red as rhodamine or eosine.
Soap-Making ManualE. G. Thomssen
In the latter mixture they stain really with the methylene blue salt of eosine.
Histology of the BloodPaul Ehrlich
Potassa turns rosolic acid and coralline from an orange-red to a bright red, while it produces no change in eosine.
eosin
eosine (ˈiːəʊsɪn, -ˌsiːn)
- Also called: bromeosin 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
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Word Origin
C19: from Greek ēōs dawn + -in; referring to the colour it gives to silk
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
eosin
(ē′ə-sən)- Any of a class of red acid dyes of the xanthene group used as cytoplasmic stains and as counterstains, especially the sodium and potassium salts of certain of these dyes.
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