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Lanthanum
/ˈlænθənəm/
A chemical element (symbol La) with an atomic number of 57: a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.
📖 Definitions of "Lanthanum"
noun
- 1
A chemical element (symbol La) with an atomic number of 57: a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.
- 2
An atom of this element.
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