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

 

velum

 noun
noun
BrE BrE//ˈviːləm//
 
; NAmE NAmE//ˈviːləm//
 
(pl. vela
BrE BrE//ˈviːlə//
 
; NAmE NAmE//ˈviːlə//
 
)
(anatomy)
 
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a layer of tissue that covers something, especially the soft palate inside the mouth Word Origin mid 18th cent.: from Latin, literally ‘sail, curtain, covering, veil’.
See the Oxford Advanced American Dictionary entry: velum