Medical Dictionary


noun \ˈspaz-əm\

Medical Definition of SPASM

:  an involuntary and abnormal contraction of muscle or muscle fibers or of a hollow organ (as an artery, the colon, or the esophagus) that consists largely of involuntary muscle fibers
:  the state or condition of a muscle or organ affected with spasms <the renal artery went into spasm>
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