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

 

septum

 noun
noun
BrE BrE//ˈseptəm//
 
; NAmE NAmE//ˈseptəm//
 
(pl. septa
BrE BrE//ˈseptə//
 
; NAmE NAmE//ˈseptə//
 
)
(anatomy) Face
 
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a thin part that separates two hollow areas, for example the part of the nose between the nostrils See related entries: Face Word Origin mid 17th cent.: from Latin septum, from sepire ‘enclose’, from sepes ‘hedge’.
See the Oxford Advanced American Dictionary entry: septum