1. A metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
   "Terbium is used in compact fluorescent lamps"; "Terbium, atomic number 65, is used in some electronic devices for its fluorescent properties";
   - Tb, atomic number 65

Derived forms: terbiums

Type of: metal, metallic element

Part of: apatite, gadolinite, monazite, ytterbite

Encyclopedia: Terbium