ATOMIC NUMBER 63

 I. (noun) 

Sense 1

Meaning:

A bivalent and trivalent metallic element of the rare earth group

Synonyms:

atomic number 63; Eu; europium

Classified under:

Nouns denoting substances

Hypernyms ("atomic number 63" is a kind of...):

metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)

Holonyms ("atomic number 63" is a substance of...):

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

Credits