lithium

n. a very light, soft, silver-coloured metal that is a chemical element.

n. the lightest solid chemical element, an alkali metal with atomic number 3. Uncountable in its elemental sense.

“Lithium is a very reactive metal that must be stored in oil to prevent it from reacting with air.”

“As the lightest of all metals, lithium possesses a high electrochemical potential, making it an ideal component for high-energy-density applications.”

Technical

n. the material used inside rechargeable batteries for phones, laptops, and electric cars.

n. the active material in high-capacity rechargeable batteries. Often used attributively in 'lithium-ion'.

“Most modern smartphones use lithium batteries because they last a long time and are very light.”

“The global demand for lithium has surged alongside the rapid expansion of the electric vehicle market and renewable energy storage solutions.”

n. a drug used by doctors to treat certain mental health conditions, like bipolar disorder.

n. lithium carbonate or other lithium salts administered as a psychiatric medication to stabilise mood. Uncountable when referring to the medication.

“The doctor prescribed lithium to help balance his mood and prevent episodes of depression.”

“Patients prescribed lithium require regular blood tests to ensure the drug remains within a narrow therapeutic range and to monitor kidney function.”

Technical