English

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

 

breastbone

 noun
noun
BrE BrE//ˈbrestbəʊn//
 
; NAmE NAmE//ˈbrestboʊn//
 
Skeleton and muscles
 
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the long flat bone in the chest that the seven top pairs of ribs are connected to synonym sternum See related entries: Skeleton and muscles
See the Oxford Advanced American Dictionary entry: breastbone