Definitions:

1. A rare earth mineral primarily composed of yttrium phosphate and often containing traces of other rare earth elements. ADJECTIVE
   • Due to its high density, Xenotime is valuable in extracting rare earth metals used in advanced electronics.
2. Earth mineral that typically forms in prismatic or tabular crystals with a brownish-yellow or reddish-brown color. NOUN
   • The mineralogist identified the brownish crystal as xenotime.