atomic number 58

Thesaurus

Noun

1.atomic number 58 - a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth groupCe, ceriummetal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.bastnaesite, bastnasite - a yellow-to-brown mineral that is a source of rare earth elementsgadolinite, ytterbite - a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbiummonazite - a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium