[vas-oh-spaz-uhm, vey-zoh-]
sudden constriction of an artery, leading to a decrease in its diameter and in the amount of blood it can deliver.

1900–05; vaso- + spasm Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

vasospasm va·so·spasm (vā'zō-spāz'əm)
A sudden constriction of a blood vessel that reduces the blood flow. Also called angiospasm.

va'so·spas'tic (-spās'tĭk) adj.
The American Heritage® Stedman's Medical Dictionary
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