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

 

vertebra

 noun
noun
BrE BrE//ˈvɜːtɪbrə//
 
; NAmE NAmE//ˈvɜːrtɪbrə//
 
(pl. vertebrae
BrE BrE//ˈvɜːtɪbreɪ//
 
; NAmE NAmE//ˈvɜːrtɪbreɪ//
 
; BrE BrE//ˈvɜːtɪbriː//
 
; NAmE NAmE//ˈvɜːrtɪbriː//
 
)
Skeleton and muscles
 
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any of the small bones that are connected together to form the spine See related entries: Skeleton and muscles Word Origin early 17th cent.: from Latin, from vertere ‘to turn’.
See the Oxford Advanced American Dictionary entry: vertebra