fluorescein

[floo-res-ee-in, flaw-, floh-] /flʊˈrɛs i ɪn, flɔ-, floʊ-/
noun, Chemistry
1.
an orange-red, crystalline, water-insoluble solid, C 20 H 12 O 5 , that in alkaline solutions produces an orange color and an intense green fluorescence: used to trace subterranean waters and in dyes.
Also called resorcinolphthalein.
Origin of fluorescein
1875-80; fluoresce + -in2
Examples from the web for fluorescein
  • The use of fluorescein angiography in acquired macular diseases.
  • The movement of fluorescein dye in durum and soft wheat kernels was investigated during the wheat tempering process.
British Dictionary definitions for fluorescein

fluorescein

/ˌflʊəˈrɛsɪɪn/
noun
1.
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
fluorescein in Medicine

fluorescein fluo·res·ce·in (flu-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.

fluorescein in Science
fluorescein
  (fl-rěs'ē-ĭn, flô-)   
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.