i114014
Concept
a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
- Status
- active
- Source
- Princeton WordNet 3.0 – 14657566-n
a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite