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 | ||