lithium
/ˈlɪθi.əm/ noun C1- The simplest alkali metal, the lightest solid element, and the third lightest chemical element (symbol Li) with an atomic number of 3 and atomic weight of 6.94. It is a soft, silvery metal. · The importance of lithium-ion batteries makes lithium a potentially strategic natural resource.
- A single atom of this element.
- Lithium carbonate or other preparations of lithium metal used as a mood stabiliser to treat manic depression and bipolar disorders. · It seems like his moods are better since he started taking lithium.
- A lithium battery.
Plural lithiums
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