English noun: terbium | |||
1. | terbium (substance) 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 | ||
Broader (hypernym) | metal, metallic element | ||
Substance meronym | apatite, gadolinite, monazite, ytterbite | ||