eosin
Americannoun
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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.
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any of a variety of eosinlike dyes.
noun
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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
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any of several similar dyes
Other Word Forms
Etymology
Origin of eosin
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
They are identified by their distinctive granules that stain red when treated with an acidic reagent, eosin, which gave them their name.
From Science Daily • May 22, 2024
Tissue samples were processed to paraffin wax and tissue sections were routinely stained with haematoxylin and eosin.
From Nature • Sep. 8, 2015
The granules of eosinophils stain best with an acidic stain known as eosin.
From Textbooks • Jun. 19, 2013
The eye color of the mutant female is a dark eosin color, that of the male yellowish eosin.
From A Critique of the Theory of Evolution by Morgan, Thomas Hunt
Solid eosin, for example, reflects a yellowish-green and transmits a red light.
From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" by Various
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
