CEWordNet Explorer

a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group

any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium

a yellow-to-brown mineral that is a source of rare earth elements

a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium

of the period coinciding with the Christian era; preferred by some writers who are not Christians