nUranin(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.
Century Dictionary and Cyclopedia
nuraninThe trade-name of the sodium salt of fluorescein or methylfluorescein, the solution of which in water exhibits a magnificent yellowish-green fluorescence like that of uranium glass. The name is also applied to the sodium salt of benzylfluorescein, used as a dyestuff, which is also known as chrysolin.
nuraninSame as pitchblende or uraninite. See uraninite.
In some cases the matt varnish may be stained with a little aurine or uranine.