fluorescein

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fluo·res·ce·in

 (flo͝o-rĕs′ē-ĭn, flô-, flō-)
n.
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.

fluorescein

(ˌflʊəˈrɛsɪɪn) or

fluoresceine

n
(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

fluo•res•ce•in

(flʊˈrɛs i ɪn, flɔ-, floʊ-)

n.
a red crystalline compound, C20H12O5, that in alkaline solutions produces an intense green fluorescence: used as a tracer and in dyes.
[1875–80]
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
Translations

fluorescein

n fluoresceina
References in periodicals archive ?
To a solution of amino compound (6) (38 mg, 0.011 mmol) in a mixed solvent THF and absolute ethanol (3 ml, 1 : 2) were added fluorescein-5-isothiocyanate (6.5 mg, 0.017 mmol) and triethylamine (4.6 [micro]l, 0.033 mmol).
In order to attach a fluorescent probe, the compound (6) was treated with fluorescein-5-isothiocyanate (FITC) and [Et.sub.3]N in a mixed solvent THF/ethanol to give the compound (7) in moderate yield.

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