atomic number 58


Also found in: Thesaurus.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atomic number 58 - a ductile grey metallic element of the lanthanide seriesatomic number 58 - a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group
metal, 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 elements
gadolinite, ytterbite - a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium
monazite - a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium