Definitions for uranin
An alkaline salt of fluorescein, used as a brownish-red dye.
Origin: from its yellowish-green fluorescence, resembling that of uranium glass.
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