lithium
Pronunciation:
/ˈlɪθi.əm/noun
Definitions
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.
A single atom of this element.
Lithium carbonate or other preparations of lithium metal used to treat manic depression and bipolar disorders.
A lithium battery.