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Definition of Vasoconstriction

Vasoconstriction: Narrowing of the blood vessels that results from contraction of the muscular walls of the vessels. The opposite of vasoconstriction is vasodilation.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=5964
Last Editorial Review: 3/19/2012

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