Terbium

n.

1.

(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.

Noun

1.

terbium - a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite Synonyms: atomic number 65, Tb

apatite, atomic number 65, gadolinite, metal, metallic element, monazite, Tb, ytterbite