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Definition of safety lamp noun from the Oxford Advanced Learner's Dictionary

safety lamp

noun
 
/ˈseɪfti læmp/
 
/ˈseɪfti læmp/
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  1. a special lamp used in the past by miners with a flame that is protected so that it does not cause underground gases to explode
See safety lamp in the Oxford Advanced American Dictionary
trait
noun
 
 
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