Definition of fluorine noun from the Oxford Advanced American Dictionary

 

fluorine

 noun
noun
NAmE//ˈflɔrin//
 
, NAmE//ˈflʊrin//
 
[uncountable](symbol F)
 
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a chemical element. Fluorine is a poisonous, pale yellow gas and is very reactive.
See the Oxford Advanced Learner's Dictionary entry: fluorine