lithium
//ˈlɪθ.i.əm//
Noun
1
A soft, silver-white metallic chemical element with the symbol Li and atomic number 3, the lightest of all metals.
Lithium is the lightest metal on the periodic table.
2
A medication containing lithium salts, used to treat bipolar disorder and other mental health conditions.
The doctor prescribed lithium to help stabilize her mood.