Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A black or brown amorphous metallic complex uranium yttrium oxide mineral, found in granitic pegmatites.

from The Century Dictionary and Cyclopedia

  • n. A rare titanoniobate of uranium, the metals of the yttrium group, and other bases: it is found in Norway, and also in North Carolina.

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