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

 

vasoconstriction

 noun
noun
BrE BrE//ˌveɪzəʊkənˈstrɪkʃn//
 
; NAmE NAmE//ˌveɪzoʊkənˈstrɪkʃn//
 
[uncountable](biology or medical)
 
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a process in which blood vessels become narrower, which tends to increase blood pressure
See the Oxford Advanced American Dictionary entry: vasoconstriction