Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Language: Swedish
Origin: Greek hals 'salt'

halogen

 noun
     
Related topics: Elements
hal‧o‧gen [uncountable]
1 a halogen light uses halogen gas to produce light
2HCE one of a group of five simple chemical substances that make compounds easily
Definition from the Longman Dictionary of Contemporary English
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