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1. (n.) fluorescein
a red crystalline compound, C
Etymology: (1875–80)
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| Definition of 'fluorescein' |
Princeton's WordNet |
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1. (noun) fluorescein, fluoresceine, fluorescent dye, resorcinolphthalein
a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)
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| Definition of 'fluorescein' |
Webster Dictionary |
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1. (noun) fluorescein
a yellowish red, crystalline substance, C20H12O5, produced by heating together phthalic anhydride and resorcin; -- so called, from the very brilliant yellowish green fluorescence of its alkaline solutions. It has acid properties, and its salts of the alkalies are known to the trade under the name of uranin
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| Definition of 'fluorescein' |
U.S. National Library of Medicine |
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1. fluorescein
A phthalic indicator dye that appears yellow-green in normal tear film and bright green in a more alkaline medium, such as the aqueous humor, and is used therapeutically as a diagnostic aid in corneal injuries and corneal trauma. It has been approved by FDA for use in externally applied drugs and cosmetics. (From Merck Index, 12th ed; American Medical Association Drug Evaluations; 1995, p2275)
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Definitions of fluorescein 
