Found 2 items, similar to terbium.
English → English (WordNet) Definition: terbium terbium n : a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite [syn: Tb, atomic number 65]
English → English (gcide) Definition: Terbium 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]