Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Language: Greek
Origin: lithos 'stone'

lithium

 noun
     
Related topics: Elements
lith‧i‧um [uncountable]
HCE a soft silver-white metal that is the lightest known metal, is used in batteries, and is often combined with other metals. It is a chemical element: symbol Li
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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