Atomic_number_60WordNet Explorer

a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium

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