Indicator, Reagent, or Diagnostic Aid
fluorescein Audio
fluo·res·ce·in [ floo-res-ee-in, flaw-, floh- ]
Brand Names:
Altafluor; Flucaine; Fluoracaine; Fluress; Flurox
More Information:
ChemID; DrugBank; DailyMed; PDR
Definitions related to 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.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • An organic compound that has wide use as a synthetic coloring agent. It is prepared by heating phthalic anhydride and resorcinol over a zinc catalyst, and it crystallizes as a deep red powder. This agent emits an intense green fluorescence in the presence of alkaline solutions and therefore is used as a label when conjugated to antibodies or as a contrast agent for ophthalmic angiography.
    NCI
    U.S. National Cancer Institute, 2021
  • Phthalic yellow-green dye used as an indicator and diagnostic aid; used therapeutically as a diagnostic aid in corneal injuries and corneal trauma; also used to label antibodies for fluorescence.
    CRISP Thesaurus
    National Institutes of Health, 2006
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