English Dictionary |
ATOMIC NUMBER 21
Dictionary entry overview: What does atomic number 21 mean?
• ATOMIC NUMBER 21 (noun)
The noun ATOMIC NUMBER 21 has 1 sense:
1. a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite
Familiarity information: ATOMIC NUMBER 21 used as a noun is very rare.
Dictionary entry details
Sense 1
Meaning:
A white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite
Classified under:
Nouns denoting substances
Synonyms:
atomic number 21; Sc; scandium
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)
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