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 eosin Historical Examples of eosin British Dictionary definitions for eosin 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
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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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