HyperDic: atomic_number_57

English > 1 sense of the expression atomic number 57:
NOUNsubstanceatomic number 57, lanthanum, Laa white soft metallic element that tarnishes readily
English > atomic number 57: 1 sense > noun 1, substance
MeaningA white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth.
Synonymslanthanum, La
Broadermetallic element, metalAny of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
Spanishlantano, número atómico 57
Catalanlantà, lantani, número atòmic 57

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