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

An inactive village in Perry County, Missouri.

plural of lithium

(physics) A stable isotope, ⁷₃Li, having three protons and four neutrons, that makes up about 93% of natural lithium.

(physics) A stable isotope ⁶₃Li, having three protons and three neutrons, that makes up about 7% of natural lithium; it is used in the nuclear industry.

(chemistry) A salt that may be prepared by the action of hydrofluoric acid on many lithium compounds, occurring naturally as griceite; its crystals are used in optical instruments, and in radiation dosimetry (based on its radiothermoluminescence).

(inorganic chemistry) The compound lithium aluminium hydride.

(inorganic chemistry) LiH, a gray solid that reacts violently with water, and can ignite spontaneously in air; it has a number of industrial applications, and is used in the manufacture of lithium aluminium hydride.

(chemistry) the lithium salt of acetic acid; used as a buffer in electrophoresis

(chemistry) The lithium salt of perchloric acid, LiClO₄ used as a source of oxygen in portable generators, and as an electrolyte in lithium batteries.