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

 

vasodilation

 noun
noun
BrE BrE//ˌveɪzəʊdaɪˈleɪʃn//
 
; NAmE NAmE//ˌveɪzoʊdaɪˈleɪʃn//
 
[uncountable](biology or medical)
 
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a process in which blood vessels become wider, which tends to reduce blood pressure
See the Oxford Advanced American Dictionary entry: vasodilation