Definition of chlorine noun from the Oxford Advanced American Dictionary

 

chlorine

 noun
noun
NAmE//ˈklɔrin//
 
, NAmE//klɔˈrin//
 
[uncountable](symbol Cl)
 
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a chemical element. Chlorine is a poisonous greenish gas with a strong smell. It is often used in swimming pools to keep the water clean.
See the Oxford Advanced Learner's Dictionary entry: chlorine