1. A soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime
   "Ytterbium is sometimes used in certain types of lasers";
   - Yb, atomic number 70

Derived forms: ytterbiums

Type of: metal, metallic element

Part of: gadolinite, monazite, xenotime, ytterbite

Encyclopedia: Ytterbium