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ATOMIC NUMBER 57
Dictionary entry overview: What does atomic number 57 mean?
• ATOMIC NUMBER 57 (noun)
The noun ATOMIC NUMBER 57 has 1 sense:
1. a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
Familiarity information: ATOMIC NUMBER 57 used as a noun is very rare.
Dictionary entry details
Sense 1
Meaning:
A white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
Classified under:
Nouns denoting substances
Synonyms:
atomic number 57; La; lanthanum
Hypernyms ("atomic number 57" 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.)
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