lithium

A soft, silvery, highly reactive element that is an alkali metal and is used as a heat transfer medium, in thermonuclear weapons, and in batteries, lubricants, various alloys, ceramics, and optical glass. Atomic number 3; atomic weight 6.941; melting point 180.5°C; boiling point 1,342°C; specific gravity 0.534; valence 1. cross-reference: Periodic Table.

Any of several salts of lithium, especially lithium carbonate.

Chemical symbol, Li or L; atomic weight, A metallic element having a silver-white luster, quickly tarnishing in the air.

A metallic element of the alkaline group, occurring in several minerals, as petalite, spodumene, lepidolite, triphylite, etc., and otherwise widely disseminated, though in small quantities.

The simplest alkali metal, the lightest solid element, and the third lightest chemical element (symbol Li) with an atomic number of 3.

Lithium carbonate or other preparations of lithium metal used to treat manic depression and bipolar disorders.

A lithium battery.

a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals