Widening of blood vessels resulting from relaxation of the muscular wall of the vessels. What widens is actually the diameter of the interior (the lumen) of the vessel. The opposite of vasoconstriction.
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Widening of the lumen of blood vessel s. SYN: vasodilatation.
- active v. v. caused by a decrease in tonus of smooth muscle in the wall of a vessel.
- passive v. v. related to increased pressure in lumen of a vessel.

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va·so·di·la·tion .vā-zo-dī-'lā-shən or va·so·di·la·ta·tion -.dil-ə-'tā-shən, -.dī-lə- n widening of the lumen of blood vessels

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vaso·di·la·tion (va″zo-) (vas″o-di-laґshən) dilation of a vessel, especially dilation of arterioles leading to increased blood flow to a part; extreme, abnormal vasodilation is called angiectasis. Called also vasodilatation. vasodilative adj

Medical dictionary. 2011.

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  • Vasodilation — refers to the widening of blood vessels resulting from relaxation of smooth muscle cells within the vessel walls, particularly in the large arteries, arterioles and veins. The process is essentially the opposite of vasoconstriction, or the… …   Wikipedia

  • vasodilation — 1896, from vasopressor, from vaso , comb. form of L. vas container, vessel (see VAS (Cf. vas)) + DILATION (Cf. dilation). Related: Vasodilator (1881) …   Etymology dictionary

  • vasodilation — or vasodilatation noun Etymology: International Scientific Vocabulary Date: 1896 widening of the lumen of blood vessels …   New Collegiate Dictionary

  • Vasodilation — Vasodilatation (von (lateinisch) vas „Gefäß“ und dilatatio „Erweiterung“) bezeichnet die Erweiterung der Blutgefäße. Vasodilatation kann sowohl aktiv, zum Beispiel bei Erschlaffung der Gefäßmuskulatur, als auch passiv, zum Beispiel durch erhöhtes …   Deutsch Wikipedia

  • vasodilation — va·so·dil·a·tion (vā zō dī lāʹshən, dĭ ) also va·so·dil·a·ta·tion ( dĭl ə tāʹshən, dī lə ) n. Dilation of a blood vessel, as by the action of a nerve or drug. * * * …   Universalium

  • vasodilation — noun dilation of the blood vessels See Also: vasoconstriction …   Wiktionary

  • vasodilation — n. dilation of the blood vessels …   English contemporary dictionary

  • vasodilation — (also vasodilatation ˌdʌɪleɪ teɪʃ(ə)n) noun the dilatation of blood vessels, which decreases blood pressure. Derivatives vasodilator noun vasodilatory adjective …   English new terms dictionary

  • vasodilation — vaso·dilation …   English syllables

  • vasodilation — /ˌveɪzoʊˌdaɪˈleɪʃən/ (say .vayzoh.duy layshuhn) noun dilation of the blood vessels, as by the action of a nerve …  

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