atomic number 59

Thesaurus

Noun

1.atomic number 59 - a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange processPr, praseodymiummetal, 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 elementsmonazite - a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium