Atomic_number_59WordNet Explorer

a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process

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

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

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