Atomic_number_70WordNet Explorer

a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime

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

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

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

a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form