ATOMIC NUMBER 21

 I. (noun) 

Sense 1

Meaning:

A white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite

Synonyms:

atomic number 21; Sc; scandium

Classified under:

Nouns denoting substances

Hypernyms ("atomic number 21" 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 21" is a substance of...):

thortveitite (a mineral consisting of scandium yttrium silicate; a source of scandium)

Credits