EXAMPLES | WORD ORIGIN noun . Chemistry Also called bromeosin, tetrabromofluorescein. a red, crystalline, water-insoluble solid, C 20H 8Br 4O 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.
e·o·sine [ ee- uh-sin, -seen] /ˈi ə sɪn, -ˌsin/
Origin of eosin 1865–70;
-in 2 Related forms e·o·sin·ic, adjective e·o·sin·like, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for eosine Historical Examples of eosine
The dyes with the ponceaus are faster than those with
eosine or safranine.
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
In the latter mixture they stain really with the methylene blue salt of
Potassa turns rosolic acid and coralline from an orange-red to a bright red, while it produces no change in
eosine. British Dictionary definitions for eosine eosin eosine ( ˈiːəʊsɪn, -ˌsiːn) noun 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 Derived Forms eosinic, adjective eosin-like, adjective Word Origin for eosin
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
n. 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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