Longman Dictionary of Contemporary English homepage

Date: 1700-1800
Language: Modern Latin
Origin: Uranus; because the substance was discovered soon after the planet

uranium

 noun
     
Related topics: Elements
u‧ra‧ni‧um [uncountable]
HCEHCE a heavy white metal that is radioactive and is used to produce nuclear power and nuclear weapons. It is a chemical element: symbol U
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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