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Definition of halon noun from the Oxford Advanced Learner's Dictionary

halon

noun
 
/ˈheɪlɒn/
 
/ˈheɪlɑːn/
(chemistry)
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  1. a gas that is made up of carbon and one or more halogens, used especially to stop fires, but now known to damage the ozone layer
    Word Origin1960s: from halogen + -on.
See halon in the Oxford Advanced American Dictionary
Check pronunciation: halon

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