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 (flo͝o-rĕs′ē-ĭn, flô-, flō-)
An orange-red compound, C20H12O5, that exhibits intense fluorescence in alkaline solution and is used in medicine for diagnostic purposes, in oceanography as a tracer, and as a textile dye.


(ˌflʊəˈrɛsɪɪn) or


(Elements & Compounds) an orange-red crystalline compound that in aqueous solution exhibits a greenish-yellow fluorescence in reflected light and is reddish-orange in transmitted light: used as a marker in sea water and as an indicator. Formula: C20H12O5


(flʊˈrɛs i ɪn, flɔ-, floʊ-)

a red crystalline compound, C20H12O5, that in alkaline solutions produces an intense green fluorescence: used as a tracer and in dyes.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.fluorescein - 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)
solution - a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"
absorption indicator - an indicator used in reactions that involve precipitation
dye, dyestuff - a usually soluble substance for staining or coloring e.g. fabrics or hair
bromeosin, 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


n fluoresceina
References in periodicals archive ?
The blue-green appearance of pus or of an organism culture is pertaining to the combination of pyocyanin (blue pigment) and pyoverdin (fluorescein, yellow pigment).
aeruginosa: growth on MacConkey agar; pyoverdin production; oxidase test; growth at 5degC and at 42degC; oxidation of glucose, lactose, maltose; arginine dehydrolase production; reduction of nitrate to nitrite; urease production; gelatin hydrolysis.
Pyoverdin 2112 of Pseudomonas fluorescens 2112 inhibits Phytophthora capsici, a red-pepper blight-causing fungus.