eosin

Definitions

  • WordNet 3.6
    • n eosin a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures
    • ***
Webster's Revised Unabridged Dictionary
    • n Eosin (Chem) A yellow or brownish red dyestuff obtained by the action of bromine on fluoresceïn, and named from the fine rose-red which it imparts to silk. It is also used for making a fine red ink. Its solution is fluorescent.
    • ***
Century Dictionary and Cyclopedia
    • n eosin Tetrabromfluoresceïn (C20H8Br4O5), a valuable dye derived from coal-tar products, forming red or yellowish-red crystals. It forms a potassium salt, the eosin of commerce, which is a brown powder, soluble in water, and dyes silk and woolen goods rose-red. Also eosinic acid.
    • ***

Etymology

Webster's Revised Unabridged Dictionary
Gr. dawn

Usage

In literature:

Probably Xenophon wrote {oude touto eosin, all apothen ousin antipalous}, etc.
"The Polity of the Athenians and the Lacedaemonians" by Xenophon
It affords the same reactions as eosine, but its tone is more inclined to an orange.
"Scientific American Supplement, No. 363, December 16, 1882" by Various
The bluish shades of eosine colors, on the contrary, have an absorption band further in the yellow.
"Scientific American Supplement, No. 530, February 27, 1886" by Various
Thiocarmine R., Patent blues, Wool greens, indigo extract, Eosines, etc.
"The Dyeing of Cotton Fabrics" by Franklin Beech
Eosin, bluish (for blue).
"The Elements of Bacteriological Technique" by John William Henry Eyre
Benario recommends this method of fixing, especially for the haematoxylin-eosin staining.
"Histology of the Blood" by Paul Ehrlich
The eye color of the mutant female is a dark eosin color, that of the male yellowish eosin.
"A Critique of the Theory of Evolution" by Thomas Hunt Morgan
Solid eosin, for example, reflects a yellowish-green and transmits a red light.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various
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 Manual" by E. G. Thomssen
Of the three allelomorphs, white, eosin, and cherry, eosin is the most useful.
"Sex-linked Inheritance in Drosophila" by Thomas Hunt Morgan
Demonstration of pea seedlings with eosin to show above.
"A Civic Biology" by George William Hunter
***

In news:

(B) Histological examination showed slightly hyperplastic glandular tissue without cytological atypia within the reticular dermis and fatty tissue (haematoxylin and eosin staining, original magnification ×20.
***