[mass noun]the chemical element of atomic number 3, a soft silver-white metal. It is the lightest of the alkali metals(Symbol: Li) (化学元素)锂(符号:Li) ■lithium carbonate or another lithium salt, used as a mood-stabilizing drug 碳酸锂,锂盐
Lithium occurs widely as a minor component of silicate rocks, and in some rare minerals. The metal and its compounds are used in alloys, lubricating greases, chemical reagents, batteries, and other products