vasomotion

[vas-oh-moh-shuhn, vey-zoh-]
noun Physiology.
the change in diameter of a blood vessel.

Origin:
vaso- + motion

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American Heritage
Medical Dictionary

vasomotion va·so·mo·tion (vā'zō-mō'shən)
n.
Change in the caliber of a blood vessel. Also called angiokinesis.

The American Heritage® Stedman's Medical Dictionary
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Example sentences
These include favorable effects on plasma lipids and coronary artery vasomotion.
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