ATOMIC NUMBER 68

 Dictionary entry overview: What does atomic number 68 mean? 

• ATOMIC NUMBER 68 (noun)
  The noun ATOMIC NUMBER 68 has 1 sense:

1. a trivalent metallic element of the rare earth group; occurs with yttrium

  Familiarity information: ATOMIC NUMBER 68 used as a noun is very rare.

 Dictionary entry details 

• ATOMIC NUMBER 68 (noun)

Sense 1

Meaning:

A trivalent metallic element of the rare earth group; occurs with yttrium

Classified under:

Nouns denoting substances

Synonyms:

atomic number 68; Er; erbium

Hypernyms ("atomic number 68" 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 68" is a substance of...):

fergusonite (a dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals)

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

 Context examples 

An element with atomic symbol Er, atomic number 68, and atomic weight 167.259.

(Erbium, NCI Thesaurus)