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eosin

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(ē′ō sin, ē′ə-)

noun

1. a rose-colored dye, CHOBr, prepared by brominating fluorescein and used to color inks, fabrics, etc. and to stain tissues
2. its sodium or potassium salt, used as a reddish dye and as a stain in microscopy
any of various similar red dyes

Origin: < Gr ēōs, dawn (see eo-) + -in

Also eosine

Related Forms:

eosinic adjective

See eosin in American Heritage Dictionary 4

noun

A red crystalline powder, C₂₀H₈O₅Br₄, used in textile dyeing and ink manufacturing and in coloring gasoline.
The red sodium or potassium salt of this powder, used in biology to stain cells.

Origin:

Origin: Greek ēōs, dawn (from its color); see aus- in Indo-European roots

Origin: + -in

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