Uranin

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  fluorescein \fluo`res"ce*in\, fluoresceine \fluo`res"ce*ine\,
  fluorescein \flu`o*res"ce*["i]n\, n. (Chem.)
     A yellowish red, crystalline substance, {C20H12O5}, produced
     by heating together phthalic anhydride and resorcin; -- so
     called, from the very brilliant yellowish green fluorescence
     of its alkaline solutions. It has acid properties, and its


     salts of the alkalies are known to the trade under the name
     of {uranin}.
  
     Syn: fluorescein, fluorescent dye, resorcinolphthalein.
          [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Uranin \U"ra*nin\, n. (Chem.)
     An alkaline salt of fluorescein, obtained as a brownish red
     substance, which is used as a dye; -- so called from the
     peculiar yellowish green fluorescence (resembling that of
     uranium glass) of its solutions. See {Fluorescein}.
     [1913 Webster]