English

Definition of bell jar noun from the Oxford Advanced Learner's Dictionary

 

bell jar

 noun
noun
BrE BrE//ˈbel dʒɑː(r)//
 
; NAmE NAmE//ˈbel dʒɑːr//
 
 
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a tall round glass cover, used by scientists
See the Oxford Advanced American Dictionary entry: bell jar