'Terbium' definitions:
Definition of 'terbium'
From: WordNet
noun
A metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite [syn: terbium, Tb, atomic number 65]
Definition of 'Terbium'
From: GCIDE
- Terbium \Ter"bi*um\, n. [NL., fr. Ytterby, in Sweden. See Erbium.] (Chem.) A rare metallic element, found in certain minerals, as gadolinite and samarskite, with other rare earths such as ytterbium. Symbol Tb. Atomic number 65. Atomic weight 158.925. [1913 Webster +PJC]
Definition of 'Terbium'
From: Elements
- Symbol: Tb
- Atomic number: 65
- Atomic weight: 158.924
- Silvery metallic element belonging to the lanthanoids. Tb-159 is the only stable isotope, there are seventeen artificial isotopes. Discovered by G.G. Mosander in 1843.