Definitions

from The Century Dictionary.

  • noun Same as pitchblende or uraninite. See uraninite.
  • noun The 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.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry An alkaline salt of fluorescein, used as a brownish-red dye.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

uranium +‎ -in, from its yellowish-green fluorescence, resembling that of uranium glass.

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