Definition of spina bifida noun from the Oxford Advanced Learner's Dictionary

 

spina bifida

 noun
noun
BrE BrE//ˌspaɪnə ˈbɪfɪdə//
 
; NAmE NAmE//ˌspaɪnə ˈbɪfɪdə//
 
[uncountable]
 
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a medical condition in which some bones in the spine have not developed normally at birth, often causing paralysis (= loss of control or feeling) in the legs Word Origin early 18th cent.: modern Latin (from spine + bifid).
See the Oxford Advanced American Dictionary entry: spina bifida