- noun a soft silvery metallic element, the lightest known metal, often used in batteries
- A very soft, silvery-white metallic chemical element whose atomic number is 3. It is the least dense of the metals, the least reactive of the alkali metals, the solid element with the highest specific heat, and it has about 8 known isotopes, of which 2 are stable. Its applications include its use in batteries, as a getter and scavenger, in high-strength alloys with low density, and in mediums which transfer heat. Its chemical symbol is Li.
- chemical symbolLi
- noun a soft silver-white metallic element that forms compounds, used as a medical treatment for bipolar disorder