fluorescein
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iBased on the Random House Dictionary, © Random House, Inc. 2013.
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fluorescein or fluoresceine (ˌflʊəˈrɛsɪɪn) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| 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 | |
| fluoresceine or fluoresceine | |
| —n | |
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| a gadget; dingus; thingumbob. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
fluorescein fluo·res·ce·in (fl&oobreve;-rěs'ē-ĭn, flô-)
n.
An orange-red compound that exhibits intense fluorescence in alkaline solution and is used in ophthalmology to reveal corneal lesions.
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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fluorescein (fl -rěs'ē-ĭn, flô-) Pronunciation Key
An orange-red crystalline compound that exhibits intense fluorescence in alkaline solution. It is used in medicine for diagnostic purposes, in oceanography as a tracer, and as a textile dye. Chemical formula: C20H12O5. |
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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fluorescein
organicorganic compound of molecular formula C20H12O5 that has wide use as a synthetic colouring agent. It is prepared by heating phthalic anhydride and resorcinol over a zinc catalyst, and it crystallizes as a deep red powder with a melting point in the range of 314 to 316 C (597 to 601 F). Fluorescein was named for the intense green fluorescence it imparts to alkaline solutions-a colour visible even at dilutions of 1:50,000,000. It is used as a dye to colour liquids in analytic instruments, in cosmetics, and as a water tracer or marker. Halogenated derivatives made from fluorescein also include eosin and erythrosin.
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