Longman Dictionary of Contemporary English homepage

Date: 1700-1800
Language: French
Origin: nitrogène, from nitre ( NITIC ACID) + -gène 'producing'

nitrogen

 noun
     
Related topics: Elements
ni‧tro‧gen [uncountable]
HCEHE a gas that has no colour or smell, and that forms most of the Earth's air. It is a chemical element: symbol N
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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