lithium

noun4

1. •
   The simplest alkali metal, the lightest solid element, and the third lightest chemical element (symbol Li) with an atomic number of 3 and atomic weight of 6.94. It is a soft, silvery metal.

   • The importance of lithium-ion batteries makes lithium a potentially strategic natural resource.
2. •
   A single atom of this element.
3. •
   Lithium carbonate or other preparations of lithium metal used as a mood stabiliser to treat manic depression and bipolar disorders.

   • It seems like his moods are better since he started taking lithium.
4. •
   A lithium battery.