stroke

Science Dictionary
stroke   (strōk)  Pronunciation Key 
A sudden loss of brain function caused by a blockage or rupture of a blood vessel of the brain, resulting in necrosis of brain tissue (called a cerebral infarct) and characterized by loss of muscular control, weakening or loss of sensation or consciousness, dizziness, slurred speech, or other symptoms that vary with the extent and severity of brain damage. Also called cerebrovascular accident.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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