lithium
/ˈlɪθi.əm/
noun
- 1
The simplest alkali metal, the lightest solid element, and the third lightest chemical element (symbol Li) with an atomic number of 3. It is a soft, silvery metal.
- 2
A single atom of this element.
- 3
Lithium carbonate or other preparations of lithium metal used to treat manic depression and bipolar disorders.
- 4
A lithium battery.
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