Definition of vertebra noun from the Oxford Advanced American Dictionary

 

vertebra

 noun
noun
NAmE//ˈvərt̮əbrə//
 
(pl. vertebrae
NAmE//ˈvərt̮əˌbreɪ//
 
, NAmE//ˈvərt̮əˌbri//
 
)
 
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any of the small bones that are connected together to form the spine
NAmE//ˈvərt̮əbrəl//
 
adjective [only before noun]
See the Oxford Advanced Learner's Dictionary entry: vertebra